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经营范围
发明名称
DRILLING ROD
摘要
申请公布号
JPS63134781(A)
申请公布日期
1988.06.07
申请号
JP19860281390
申请日期
1986.11.26
申请人
MITSUI CONSTR CO LTD
发明人
KAWAAI AKIRA;SUZUKI AKIHIKO
分类号
E21B7/18
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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