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发明名称
ROCK BED EXCAVATION FOR FOUNDATION WORK AND ROCK BED CRUSHING HAMMER
摘要
申请公布号
JPS5664082(A)
申请公布日期
1981.06.01
申请号
JP19790139333
申请日期
1979.10.30
申请人
KITANAKA KATSUMI
发明人
KITANAKA KATSUMI
分类号
E21B1/04;E21B1/02
主分类号
E21B1/04
代理机构
代理人
主权项
地址
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