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发明名称
INSTALLATION FOR CONTROLLING A PUSHING CYLINDER AT A WORKING FACE WITH POWER ADVANCED SUPPORTS
摘要
申请公布号
US3437011(A)
申请公布日期
1969.04.08
申请号
USD3437011
申请日期
1967.01.03
申请人
STAMICARBON NV.
发明人
ABRAHAM VAN GELDER
分类号
E21D23/00;E21D23/18;(IPC1-7):F15B11/20;F15B13/04
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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