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发明名称
RING CUTTER FOR TUNNEL AND SHAFT DRILLING IN ROCK
摘要
<p>Ring cutter for tunnel and shaft drilling in rock, the ring cutter (1) thereby comprising at least two ring cutter segments being secured to the rotation body (5) of the ring cutter (1) by means of tightening devices.</p>
申请公布号
WO1988005117(A1)
申请公布日期
1988.07.14
申请号
NO1987000085
申请日期
1987.12.29
申请人
发明人
分类号
主分类号
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代理人
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