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发明名称	EXCAVATION METHOD OF SHAFT
摘要
申请公布号	JPH09235976(A)	申请公布日期	1997.09.09
申请号	JP19960073292	申请日期	1996.03.04
申请人	SATO KIGYO:KK	发明人	HONMA NOBUYOSHI;IDA TADASHI
分类号	E21B7/20;E21D1/00;(IPC1-7):E21D1/00	主分类号	E21B7/20
代理机构		代理人
主权项
地址

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