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经营范围
发明名称
EXCAVATION FACILITY
摘要
申请公布号
JPS63233192(A)
申请公布日期
1988.09.28
申请号
JP19870320024
申请日期
1987.12.17
申请人
DRG PLC
发明人
BURAIAN KIMU SUINPUSON
分类号
E21B15/00;E21B19/15;E21B19/16
主分类号
E21B15/00
代理机构
代理人
主权项
地址
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