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发明名称
Einrichtung zum Antrieb und zur Fuehrung von endlos umlaufenden Zugmitteln fuer Kohlengewinnungs- und -foerdervorrichtungen
摘要
申请公布号
DE938245(C)
申请公布日期
1956.01.26
申请号
DE1952R010462
申请日期
1952.12.10
申请人
RITCHIE CAMPBELL
发明人
RITCHIE CAMPBELL
分类号
E21C29/16
主分类号
E21C29/16
代理机构
代理人
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