破碎机品种繁多,以下简要介绍八种最常用的破碎机供大家认识: 第一种:颚式破碎机 ,是一级破碎的首选设备,具有破碎比大、产品粒度均匀、结构简单、作 破碎机主要分类及选购指南 破碎机品种繁多,以下简要介绍八种最常用的破碎机供大家认识: 第一种:颚式破碎机 ,是一级破碎的首选设备,具有破碎比大、产品粒度均匀、结构简单、作
了解更多破碎硬质或中硬质石料,宜选用颚式破碎设备作为一级破碎设备,破碎中硬或软质石料时,可直接选用圆锥、反击或锤式破碎机。 2.物料的规格 若物料规格尺寸较大,可选用颚式破 厉害了,原来破碎机这样来选型号,涨知识了 破碎硬质或中硬质石料,宜选用颚式破碎设备作为一级破碎设备,破碎中硬或软质石料时,可直接选用圆锥、反击或锤式破碎机。 2.物料的规格 若物料规格尺寸较大,可选用颚式破
了解更多在制砂生产线中用于一级破碎。 颚式破碎机在制砂生产线上常处于重要地位,有很多性能优势,如采用耐磨性能好的材料结构,既保证了易损件的耐磨性,又延长了使用寿命。 该设备结构设计合理,卸料 破碎机种类这么多,别再傻傻分不清 在制砂生产线中用于一级破碎。 颚式破碎机在制砂生产线上常处于重要地位,有很多性能优势,如采用耐磨性能好的材料结构,既保证了易损件的耐磨性,又延长了使用寿命。 该设备结构设计合理,卸料
了解更多锤式破碎机是以冲击形式破碎物料的一种设备,分单转子和双转子两种形式。 是直接将最大粒度为600-1800毫米的物料破碎至25或25毫米以下的一段破碎用破碎机。 锤式破碎机 百度百科锤式破碎机是以冲击形式破碎物料的一种设备,分单转子和双转子两种形式。 是直接将最大粒度为600-1800毫米的物料破碎至25或25毫米以下的一段破碎用破碎机。
了解更多破碎硬质或中硬质石料,宜选用颚式破碎设备作为一级破碎设备,破碎中硬或软质石料时,可直接选用圆锥、反击或锤式破碎机。 选择破碎机要考虑什么因素? 破碎硬质或中硬质石料,宜选用颚式破碎设备作为一级破碎设备,破碎中硬或软质石料时,可直接选用圆锥、反击或锤式破碎机。
了解更多颚式破碎机俗称颚破,又名老虎口。由动颚和静颚两块颚板组成破碎腔,模拟动物的两颚运动而完成物料破碎作业的破碎机。广泛运用于矿山冶炼、建材、公路、铁路、水利和化工 颚式破碎机 百度百科颚式破碎机俗称颚破,又名老虎口。由动颚和静颚两块颚板组成破碎腔,模拟动物的两颚运动而完成物料破碎作业的破碎机。广泛运用于矿山冶炼、建材、公路、铁路、水利和化工
了解更多圆锥式破碎机的工作原理与旋回破碎机相同,但仅适用于中碎或细碎作业的破碎机械。 中、细碎作业的排料粒度的均匀性一般比粗碎作业要求的高,因此,在破碎腔的下部须设置一段平行区,同时,还须加快破碎锥的旋回 破碎机_百度百科圆锥式破碎机的工作原理与旋回破碎机相同,但仅适用于中碎或细碎作业的破碎机械。 中、细碎作业的排料粒度的均匀性一般比粗碎作业要求的高,因此,在破碎腔的下部须设置一段平行区,同时,还须加快破碎锥的旋回
了解更多CN112170445A CN202010914153.2A CN202010914153A CN112170445A CN 112170445 A CN112170445 A CN 112170445A CN 202010914153 A CN202010914153 A CN 202010914153A CN 112170445 A CN112170445 A CN 112170445A Authority CN China Prior art keywords construction waste crusher intelligent aggregate feeding Prior art date CN112170445A 一种建筑垃圾智能化处置系统 Google PatentsCN112170445A CN202010914153.2A CN202010914153A CN112170445A CN 112170445 A CN112170445 A CN 112170445A CN 202010914153 A CN202010914153 A CN 202010914153A CN 112170445 A CN112170445 A CN 112170445A Authority CN China Prior art keywords construction waste crusher intelligent aggregate feeding Prior art date
了解更多CN106734105A CN201611265631.1A CN201611265631A CN106734105A CN 106734105 A CN106734105 A CN 106734105A CN 201611265631 A CN201611265631 A CN 201611265631A CN 106734105 A CN106734105 A CN 106734105A Authority CN China Prior art keywords disintegrating collecting box waste textiles regeneration system slide CN106734105A 一种多级废旧织物分解再生系统 Google PatentsCN106734105A CN201611265631.1A CN201611265631A CN106734105A CN 106734105 A CN106734105 A CN 106734105A CN 201611265631 A CN201611265631 A CN 201611265631A CN 106734105 A CN106734105 A CN 106734105A Authority CN China Prior art keywords disintegrating collecting box waste textiles regeneration system slide
了解更多CN209124140U CN201821643601.4U CN201821643601U CN209124140U CN 209124140 U CN209124140 U CN 209124140U CN 201821643601 U CN201821643601 U CN 201821643601U CN 209124140 U CN209124140 U CN 209124140U Authority CN China Prior art keywords coal bolter stage crushing crushing product product Prior art date CN209124140U 一种中煤品质的提升系统 Google PatentsCN209124140U CN201821643601.4U CN201821643601U CN209124140U CN 209124140 U CN209124140 U CN 209124140U CN 201821643601 U CN201821643601 U CN 201821643601U CN 209124140 U CN209124140 U CN 209124140U Authority CN China Prior art keywords coal bolter stage crushing crushing product product Prior art date
了解更多CN206392571U CN201621482802.1U CN201621482802U CN206392571U CN 206392571 U CN206392571 U CN 206392571U CN 201621482802 U CN201621482802 U CN 201621482802U CN 206392571 U CN206392571 U CN 206392571U Authority CN China Prior art keywords disintegrating collecting box waste textiles regeneration system slide CN206392571U 一种多级废旧织物分解再生系统 Google PatentsCN206392571U CN201621482802.1U CN201621482802U CN206392571U CN 206392571 U CN206392571 U CN 206392571U CN 201621482802 U CN201621482802 U CN 201621482802U CN 206392571 U CN206392571 U CN 206392571U Authority CN China Prior art keywords disintegrating collecting box waste textiles regeneration system slide
了解更多CN106861894A CN201710202688.5A CN201710202688A CN106861894A CN 106861894 A CN106861894 A CN 106861894A CN 201710202688 A CN201710202688 A CN 201710202688A CN 106861894 A CN106861894 A CN 106861894A Authority CN China Prior art keywords house refuse combustiblerefuse refuse platform storehouse Prior art CN106861894A Google PatentsCN106861894A CN201710202688.5A CN201710202688A CN106861894A CN 106861894 A CN106861894 A CN 106861894A CN 201710202688 A CN201710202688 A CN 201710202688A CN 106861894 A CN106861894 A CN 106861894A Authority CN China Prior art keywords house refuse combustiblerefuse refuse platform storehouse Prior art
了解更多CN107996976B CN201810004972.6A CN201810004972A CN107996976B CN 107996976 B CN107996976 B CN 107996976B CN 201810004972 A CN201810004972 A CN 201810004972A CN 107996976 B CN107996976 B CN 107996976B Authority CN China Prior art keywords corn primary machine crusher embryo Prior art date Legal CN107996976B 一种超微细玉米粉体加工装置及加工方法CN107996976B CN201810004972.6A CN201810004972A CN107996976B CN 107996976 B CN107996976 B CN 107996976B CN 201810004972 A CN201810004972 A CN 201810004972A CN 107996976 B CN107996976 B CN 107996976B Authority CN China Prior art keywords corn primary machine crusher embryo Prior art date Legal
了解更多CN110976495A CN202010040550.1A CN202010040550A CN110976495A CN 110976495 A CN110976495 A CN 110976495A CN 202010040550 A CN202010040550 A CN 202010040550A CN 110976495 A CN110976495 A CN 110976495A Authority CN China Prior art keywords separator primary tank vibrating screen belt filter Prior art date 2020 CN110976495A Google PatentsCN110976495A CN202010040550.1A CN202010040550A CN110976495A CN 110976495 A CN110976495 A CN 110976495A CN 202010040550 A CN202010040550 A CN 202010040550A CN 110976495 A CN110976495 A CN 110976495A Authority CN China Prior art keywords separator primary tank vibrating screen belt filter Prior art date 2020
了解更多CN217616734U CN202221747049.XU CN202221747049U CN217616734U CN 217616734 U CN217616734 U CN 217616734U CN 202221747049 U CN202221747049 U CN 202221747049U CN 217616734 U CN217616734 U CN 217616734U Authority CN China Prior art keywords breaker grade level bin soil Prior art date Legal status CN217616734U 污染土细碎设备 Google PatentsCN217616734U CN202221747049.XU CN202221747049U CN217616734U CN 217616734 U CN217616734 U CN 217616734U CN 202221747049 U CN202221747049 U CN 202221747049U CN 217616734 U CN217616734 U CN 217616734U Authority CN China Prior art keywords breaker grade level bin soil Prior art date Legal status
了解更多CN216594220U CN202122503556.0U CN202122503556U CN216594220U CN 216594220 U CN216594220 U CN 216594220U CN 202122503556 U CN202122503556 U CN 202122503556U CN 216594220 U CN216594220 U CN 216594220U Authority CN China Prior art keywords stage feeder crusher hopper heavy Prior art date Legal CN216594220U 一种重介浅槽精煤自动采样装置 Google PatentsCN216594220U CN202122503556.0U CN202122503556U CN216594220U CN 216594220 U CN216594220 U CN 216594220U CN 202122503556 U CN202122503556 U CN 202122503556U CN 216594220 U CN216594220 U CN 216594220U Authority CN China Prior art keywords stage feeder crusher hopper heavy Prior art date Legal
了解更多CN113731536A CN202110914041.1A CN202110914041A CN113731536A CN 113731536 A CN113731536 A CN 113731536A CN 202110914041 A CN202110914041 A CN 202110914041A CN 113731536 A CN113731536 A CN 113731536A Authority CN China Prior art keywords granularity oil shale crusher raw ore crushing Prior art date 2021-08 CN113731536A Google PatentsCN113731536A CN202110914041.1A CN202110914041A CN113731536A CN 113731536 A CN113731536 A CN 113731536A CN 202110914041 A CN202110914041 A CN 202110914041A CN 113731536 A CN113731536 A CN 113731536A Authority CN China Prior art keywords granularity oil shale crusher raw ore crushing Prior art date 2021-08
了解更多CN206824378U CN201720324878.XU CN201720324878U CN206824378U CN 206824378 U CN206824378 U CN 206824378U CN 201720324878 U CN201720324878 U CN 201720324878U CN 206824378 U CN206824378 U CN 206824378U Authority CN China Prior art keywords combustiblerefuse level cloth wringer domestic garbage Prior art date CN206824378U 带有布料暂存库的生活垃圾分拣设备CN206824378U CN201720324878.XU CN201720324878U CN206824378U CN 206824378 U CN206824378 U CN 206824378U CN 201720324878 U CN201720324878 U CN 201720324878U CN 206824378 U CN206824378 U CN 206824378U Authority CN China Prior art keywords combustiblerefuse level cloth wringer domestic garbage Prior art date
了解更多CN104183855A CN201310213322.XA CN201310213322A CN104183855A CN 104183855 A CN104183855 A CN 104183855A CN 201310213322 A CN201310213322 A CN 201310213322A CN 104183855 A CN104183855 A CN 104183855A Authority CN China Prior art keywords space bag crushed crusher zinc copper Prior art date CN104183855A 一种废旧电池回收系统及其回收方法CN104183855A CN201310213322.XA CN201310213322A CN104183855A CN 104183855 A CN104183855 A CN 104183855A CN 201310213322 A CN201310213322 A CN 201310213322A CN 104183855 A CN104183855 A CN 104183855A Authority CN China Prior art keywords space bag crushed crusher zinc copper Prior art date
了解更多CN107952566A CN201711063683.5A CN201711063683A CN107952566A CN 107952566 A CN107952566 A CN 107952566A CN 201711063683 A CN201711063683 A CN 201711063683A CN 107952566 A CN107952566 A CN 107952566A Authority CN China Prior art keywords crusher level broken crushing pusher Prior art date Legal CN107952566A 一种垃圾破碎机 Google PatentsCN107952566A CN201711063683.5A CN201711063683A CN107952566A CN 107952566 A CN107952566 A CN 107952566A CN 201711063683 A CN201711063683 A CN 201711063683A CN 107952566 A CN107952566 A CN 107952566A Authority CN China Prior art keywords crusher level broken crushing pusher Prior art date Legal
了解更多CN108212463A CN201810004953.3A CN201810004953A CN108212463A CN 108212463 A CN108212463 A CN 108212463A CN 201810004953 A CN201810004953 A CN 201810004953A CN 108212463 A CN108212463 A CN 108212463A Authority CN China Prior art keywords level corn machine crusher corn flour Prior art date Legal CN108212463A 一种玉米粉精加工装置及精加工方法CN108212463A CN201810004953.3A CN201810004953A CN108212463A CN 108212463 A CN108212463 A CN 108212463A CN 201810004953 A CN201810004953 A CN 201810004953A CN 108212463 A CN108212463 A CN 108212463A Authority CN China Prior art keywords level corn machine crusher corn flour Prior art date Legal
了解更多CN218014823U CN202222170454.6U CN202222170454U CN218014823U CN 218014823 U CN218014823 U CN 218014823U CN 202222170454 U CN202222170454 U CN 202222170454U CN 218014823 U CN218014823 U CN 218014823U Authority CN China Prior art keywords kitchen waste kitchen lifting machine squeezer pretreatment system CN218014823U 一种厨余垃圾的预处理系统 Google PatentsCN218014823U CN202222170454.6U CN202222170454U CN218014823U CN 218014823 U CN218014823 U CN 218014823U CN 202222170454 U CN202222170454 U CN 202222170454U CN 218014823 U CN218014823 U CN 218014823U Authority CN China Prior art keywords kitchen waste kitchen lifting machine squeezer pretreatment system
了解更多CN204412329U CN201420846593.9U CN201420846593U CN204412329U CN 204412329 U CN204412329 U CN 204412329U CN 201420846593 U CN201420846593 U CN 201420846593U CN 204412329 U CN204412329 U CN 204412329U Authority CN China Prior art keywords calcium carbide coarse crushing crushing system elevator vibratory CN204412329U 一种电石粗破碎系统 Google PatentsCN204412329U CN201420846593.9U CN201420846593U CN204412329U CN 204412329 U CN204412329 U CN 204412329U CN 201420846593 U CN201420846593 U CN 201420846593U CN 204412329 U CN204412329 U CN 204412329U Authority CN China Prior art keywords calcium carbide coarse crushing crushing system elevator vibratory
了解更多CN102717451A CN2012102284757A CN201210228475A CN102717451A CN 102717451 A CN102717451 A CN 102717451A CN 2012102284757 A CN2012102284757 A CN 2012102284757A CN 201210228475 A CN201210228475 A CN 201210228475A CN 102717451 A CN102717451 A CN 102717451A Authority CN China Prior art keywords CN102717451A 一种废旧塑料资源化处理方法及设备CN102717451A CN2012102284757A CN201210228475A CN102717451A CN 102717451 A CN102717451 A CN 102717451A CN 2012102284757 A CN2012102284757 A CN 2012102284757A CN 201210228475 A CN201210228475 A CN 201210228475A CN 102717451 A CN102717451 A CN 102717451A Authority CN China Prior art keywords
了解更多CN208906125U CN201821515564.9U CN201821515564U CN208906125U CN 208906125 U CN208906125 U CN 208906125U CN 201821515564 U CN201821515564 U CN 201821515564U CN 208906125 U CN208906125 U CN 208906125U Authority CN China Prior art keywords level screening machine conveyer abrasive material feed bin Prior art CN208906125U 一种用于磨料生产的自动化生产线 GoogleCN208906125U CN201821515564.9U CN201821515564U CN208906125U CN 208906125 U CN208906125 U CN 208906125U CN 201821515564 U CN201821515564 U CN 201821515564U CN 208906125 U CN208906125 U CN 208906125U Authority CN China Prior art keywords level screening machine conveyer abrasive material feed bin Prior art
了解更多CN211190530U CN201921956975.6U CN201921956975U CN211190530U CN 211190530 U CN211190530 U CN 211190530U CN 201921956975 U CN201921956975 U CN 201921956975U CN 211190530 U CN211190530 U CN 211190530U Authority CN China Prior art keywords crusher ground material aggregate dust stage Prior art date 2019-11 CN211190530U 一种集料地材机制加工系统 Google PatentsCN211190530U CN201921956975.6U CN201921956975U CN211190530U CN 211190530 U CN211190530 U CN 211190530U CN 201921956975 U CN201921956975 U CN 201921956975U CN 211190530 U CN211190530 U CN 211190530U Authority CN China Prior art keywords crusher ground material aggregate dust stage Prior art date 2019-11
了解更多CN112697994A CN202011459922.0A CN202011459922A CN112697994A CN 112697994 A CN112697994 A CN 112697994A CN 202011459922 A CN202011459922 A CN 202011459922A CN 112697994 A CN112697994 A CN 112697994A Authority CN China Prior art keywords coal sample detection sampling intelligent Prior art date CN112697994A 一种无人干预快速煤质智能检测计量系统CN112697994A CN202011459922.0A CN202011459922A CN112697994A CN 112697994 A CN112697994 A CN 112697994A CN 202011459922 A CN202011459922 A CN 202011459922A CN 112697994 A CN112697994 A CN 112697994A Authority CN China Prior art keywords coal sample detection sampling intelligent Prior art date
了解更多CN207929411U CN201821080107.1U CN201821080107U CN207929411U CN 207929411 U CN207929411 U CN 207929411U CN 201821080107 U CN201821080107 U CN 201821080107U CN 207929411 U CN207929411 U CN 207929411U Authority CN China Prior art keywords separator tin copper screen drum waste Prior art date CN207929411U 一种废旧电路板的铜锡分离装置 Google PatentsCN207929411U CN201821080107.1U CN201821080107U CN207929411U CN 207929411 U CN207929411 U CN 207929411U CN 201821080107 U CN201821080107 U CN 201821080107U CN 207929411 U CN207929411 U CN 207929411U Authority CN China Prior art keywords separator tin copper screen drum waste Prior art date
了解更多CN218222795U CN202221935859.8U CN202221935859U CN218222795U CN 218222795 U CN218222795 U CN 218222795U CN 202221935859 U CN202221935859 U CN 202221935859U CN 218222795 U CN218222795 U CN 218222795U Authority CN China Prior art keywords waste paper treating separator iron remover belt Prior art date 2022 CN218222795U 一种处理废纸轻渣的装置系统 Google PatentsCN218222795U CN202221935859.8U CN202221935859U CN218222795U CN 218222795 U CN218222795 U CN 218222795U CN 202221935859 U CN202221935859 U CN 202221935859U CN 218222795 U CN218222795 U CN 218222795U Authority CN China Prior art keywords waste paper treating separator iron remover belt Prior art date 2022
了解更多CN216499912U CN202122729232.9U CN202122729232U CN216499912U CN 216499912 U CN216499912 U CN 216499912U CN 202122729232 U CN202122729232 U CN 202122729232U CN 216499912 U CN216499912 U CN 216499912U Authority CN China Prior art keywords spiral feeding room screw grade Prior art date Legal CN216499912U 废线路板湿法破碎自动分料系统 Google PatentsCN216499912U CN202122729232.9U CN202122729232U CN216499912U CN 216499912 U CN216499912 U CN 216499912U CN 202122729232 U CN202122729232 U CN 202122729232U CN 216499912 U CN216499912 U CN 216499912U Authority CN China Prior art keywords spiral feeding room screw grade Prior art date Legal
了解更多CN214288681U CN202021888799.XU CN202021888799U CN214288681U CN 214288681 U CN214288681 U CN 214288681U CN 202021888799 U CN202021888799 U CN 202021888799U CN 214288681 U CN214288681 U CN 214288681U Authority CN China Prior art keywords separator discharging pipe lead acid CN214288681U 一种废铅酸蓄电池自动破碎线 Google PatentsCN214288681U CN202021888799.XU CN202021888799U CN214288681U CN 214288681 U CN214288681 U CN 214288681U CN 202021888799 U CN202021888799 U CN 202021888799U CN 214288681 U CN214288681 U CN 214288681U Authority CN China Prior art keywords separator discharging pipe lead acid
了解更多CN203459383U CN201320506946.6U CN201320506946U CN203459383U CN 203459383 U CN203459383 U CN 203459383U CN 201320506946 U CN201320506946 U CN 201320506946U CN 203459383 U CN203459383 U CN 203459383U Authority CN China Prior art keywords conveying worm potcher lead level number conveying Prior art date CN203459383U 铅酸蓄电池上盖破碎分选设备 Google PatentsCN203459383U CN201320506946.6U CN201320506946U CN203459383U CN 203459383 U CN203459383 U CN 203459383U CN 201320506946 U CN201320506946 U CN 201320506946U CN 203459383 U CN203459383 U CN 203459383U Authority CN China Prior art keywords conveying worm potcher lead level number conveying Prior art date
了解更多CN106925600A CN201710202701.7A CN201710202701A CN106925600A CN 106925600 A CN106925600 A CN 106925600A CN 201710202701 A CN201710202701 A CN 201710202701A CN 106925600 A CN106925600 A CN 106925600A Authority CN China Prior art keywords domestic garbage level combustible waste rinsing bath house refuse CN106925600A 两级榨水破碎型生活垃圾分拣设备 GoogleCN106925600A CN201710202701.7A CN201710202701A CN106925600A CN 106925600 A CN106925600 A CN 106925600A CN 201710202701 A CN201710202701 A CN 201710202701A CN 106925600 A CN106925600 A CN 106925600A Authority CN China Prior art keywords domestic garbage level combustible waste rinsing bath house refuse
了解更多CN104183855B CN201310213322.XA CN201310213322A CN104183855B CN 104183855 B CN104183855 B CN 104183855B CN 201310213322 A CN201310213322 A CN 201310213322A CN 104183855 B CN104183855 B CN 104183855B Authority CN China Prior art keywords space bag old level carbon copper Prior art date Legal CN104183855B 一种废旧电池回收系统及其回收方法CN104183855B CN201310213322.XA CN201310213322A CN104183855B CN 104183855 B CN104183855 B CN 104183855B CN 201310213322 A CN201310213322 A CN 201310213322A CN 104183855 B CN104183855 B CN 104183855B Authority CN China Prior art keywords space bag old level carbon copper Prior art date Legal
了解更多CN109013017A CN201811081374.5A CN201811081374A CN109013017A CN 109013017 A CN109013017 A CN 109013017A CN 201811081374 A CN201811081374 A CN 201811081374A CN 109013017 A CN109013017 A CN 109013017A Authority CN China Prior art keywords level screening machine conveyer abrasive material feed bin Prior art CN109013017A 一种用于磨料生产的自动化生产线 GoogleCN109013017A CN201811081374.5A CN201811081374A CN109013017A CN 109013017 A CN109013017 A CN 109013017A CN 201811081374 A CN201811081374 A CN 201811081374A CN 109013017 A CN109013017 A CN 109013017A Authority CN China Prior art keywords level screening machine conveyer abrasive material feed bin Prior art
了解更多CN2778417Y CN 200520069460 CN200520069460U CN2778417Y CN 2778417 Y CN2778417 Y CN 2778417Y CN 200520069460 CN200520069460 CN 200520069460 CN 200520069460 U CN200520069460 U CN 200520069460U CN 2778417 Y CN2778417 Y CN 2778417Y Authority CN China Prior art keywords raw material connects machine CN2778417Y Google PatentsCN2778417Y CN 200520069460 CN200520069460U CN2778417Y CN 2778417 Y CN2778417 Y CN 2778417Y CN 200520069460 CN200520069460 CN 200520069460 CN 200520069460 U CN200520069460 U CN 200520069460U CN 2778417 Y CN2778417 Y CN 2778417Y Authority CN China Prior art keywords raw material connects machine
了解更多CN202824091U CN2012205447145U CN201220544714U CN202824091U CN 202824091 U CN202824091 U CN 202824091U CN 2012205447145 U CN2012205447145 U CN 2012205447145U CN 201220544714 U CN201220544714 U CN 201220544714U CN 202824091 U CN202824091 U CN 202824091U Authority CN China Prior art keywords CN202824091U 一种冰箱拆解破碎分选系统 Google PatentsCN202824091U CN2012205447145U CN201220544714U CN202824091U CN 202824091 U CN202824091 U CN 202824091U CN 2012205447145 U CN2012205447145 U CN 2012205447145U CN 201220544714 U CN201220544714 U CN 201220544714U CN 202824091 U CN202824091 U CN 202824091U Authority CN China Prior art keywords
了解更多