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摘要
申请公布号
JPH0351875(B2)
申请公布日期
1991.08.08
申请号
JP19860072559
申请日期
1986.04.01
申请人
KASUGA SAKUSEN KK
发明人
KASUGA EIKICHI
分类号
E21B10/32;E02D7/00
主分类号
E21B10/32
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