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发明名称
APPARATUS FOR CONTROLLING EXTENDABLE ROOF CAP CYLINDER IN SELF-ADVANCING ROOF SUPPORTS
摘要
申请公布号
PL261377(A1)
申请公布日期
1987.07.27
申请号
PL19860261377
申请日期
1986.09.12
申请人
发明人
分类号
E21D23/18;(IPC1-7):E21D/
主分类号
E21D23/18
代理机构
代理人
主权项
地址
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