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发明名称
SONIC BORING SYSTEM USING SPHERICAL DRILL BIT
摘要
申请公布号
JPS61282588(A)
申请公布日期
1986.12.12
申请号
JP19860093184
申请日期
1986.04.21
申请人
ARUBAATO JIYOOJI BOODEIN
发明人
ARUBAATO JIYOOJI BOODEIN
分类号
E02D7/18;E02D7/22;E02D11/00;E21B4/00;E21B4/02;E21B7/24;E21B10/16;E21B10/22
主分类号
E02D7/18
代理机构
代理人
主权项
地址
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Barbed wire basket
