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发明名称
EXCAVATOR FOR SOIL
摘要
申请公布号
JPH04327687(A)
申请公布日期
1992.11.17
申请号
JP19910123043
申请日期
1991.04.26
申请人
HAKKO CO LTD
发明人
KOGA MOTOYUKI;SATO TORU
分类号
E21B7/00;E21B7/18;E21B10/60
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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