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发明名称
METHOD AND APPARATUS FOR THRUSTING A SHIELD FOR USE IN TUNNELING
摘要
申请公布号
IL71487(D0)
申请公布日期
1984.07.31
申请号
IL19840071487
申请日期
1984.04.10
申请人
ISEKI KAIHATSU KOKI KK
发明人
分类号
E21B7/20;E21D9/06;E21D9/08;E21D9/087;(IPC1-7):E02D/
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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