,申请号JP19810193645U-传众专利搜索

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发明名称
摘要
申请公布号	JPS627750(Y2)	申请公布日期	1987.02.23
申请号	JP19810193645U	申请日期	1981.12.28
申请人		发明人
分类号	E21B11/00;(IPC1-7):E21B11/00	主分类号	E21B11/00
代理机构		代理人
主权项
地址

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