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经营范围
发明名称
DRILLING METHOD
摘要
申请公布号
JPS62280483(A)
申请公布日期
1987.12.05
申请号
JP19860120093
申请日期
1986.05.27
申请人
TOKYU CONSTR CO LTD;DAIMATSU DOKEN KOGYO KK
发明人
HIROSE MASAAKI;HIRAGA FUMIO
分类号
E21B7/20
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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