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发明名称
TEMPORARY ROOF SUPPORT CYLINDER
摘要
申请公布号
AU623278(B2)
申请公布日期
1992.05.07
申请号
AU19900062108
申请日期
1990.09.03
申请人
JOY TECHNOLOGIES INC.
发明人
JOSEPH J. ZIMMERMAN
分类号
E21D9/10;E21D15/44;(IPC1-7):E21D15/44;E21D15/51
主分类号
E21D9/10
代理机构
代理人
主权项
地址
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