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发明名称
ADVANCING MECHANISM WITH A DOUBLE PULLING CHAIN ESPECIALLY FOR MINING MACHINES
摘要
申请公布号
PL114091(B1)
申请公布日期
1981.01.31
申请号
PL19780204292
申请日期
1978.01.26
申请人
发明人
分类号
E21C;E21C29/14;F16H57/08;(IPC1-7):E21C29/14
主分类号
E21C
代理机构
代理人
主权项
地址
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