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经营范围
发明名称
BOTTOM EXPANDING EXCAVATOR
摘要
申请公布号
JPS57205693(A)
申请公布日期
1982.12.16
申请号
JP19810088722
申请日期
1981.06.08
申请人
TAKENAKA KOMUTEN KK
发明人
TAKAGI MUTSUMI;MIYAGUCHI MASAO;ISHIKAWA YOSHIHIRO
分类号
E21B7/28;E21B11/00;E21B11/04
主分类号
E21B7/28
代理机构
代理人
主权项
地址
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