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公开(公告)号:JPH0228677B2
公开(公告)日:1990-06-26
申请号:JP12310483
申请日:1983-07-06
Applicant: TAMPELLA OY AB
Inventor: OTSUSHI PEEIBAARAAINEN , REO HOOKINEN
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2.Drill rod opening apparatus used in drilling apparatus using combined rod 失效
Title translation: 使用组合式钻杆钻机的钻孔开孔装置公开(公告)号:JPS5924096A
公开(公告)日:1984-02-07
申请号:JP12310483
申请日:1983-07-06
Applicant: Tampella Oy Ab
Inventor: OTSUSHI PEEIBAARAAINEN , REO HOOKINEN
CPC classification number: E21B19/16
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