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经营范围
发明名称
DUST CONVEYING AND COLLECTION SYSTEM
摘要
申请公布号
EP0056014(A3)
申请公布日期
1982.08.11
申请号
EP19820300046
申请日期
1982.01.06
申请人
HOWETH, DAVID FRANKLIN
发明人
HOWETH, DAVID FRANKLIN
分类号
B01D45/04;B01D50/00;E21B21/015;E21B21/07;(IPC1-7):E21C7/02
主分类号
B01D45/04
代理机构
代理人
主权项
地址
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