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经营范围
发明名称
SHAFT HOLE EXCAVATOR
摘要
申请公布号
JPS57133993(A)
申请公布日期
1982.08.18
申请号
JP19810018810
申请日期
1981.02.10
申请人
TAKENAKA KOMUTEN KK
发明人
TAKAHASHI MASAAKI;TOUFUJI TAKAYOSHI;OOI KIYOUJI
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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