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发明名称
摘要
申请公布号	JPH037792(B2)	申请公布日期	1991.02.04
申请号	JP19850264133	申请日期	1985.11.25
申请人	TONE BORING CO	发明人	HAMAMURA HIROYUKI;MIZUNO YOSHIFUMI
分类号	E21B4/14;E21B4/16	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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