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法人/股东/高管

发明名称
摘要
申请公布号	JPS5651887(U)	申请公布日期	1981.05.08
申请号	JP19800116646U	申请日期	1980.08.18
申请人		发明人
分类号	E21B7/02;E21B15/00;E21B19/08;(IPC1-7):E21C11/02	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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