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摘要
申请公布号
JPH0553920(B2)
申请公布日期
1993.08.11
申请号
JP19870274326
申请日期
1987.10.28
申请人
CHOWA KOGYO KK
发明人
KONO KENJI;SUZUKI JUKICHI
分类号
E02F5/16;E02F3/47;E21B7/24;E21B11/04;(IPC1-7):E21B11/04
主分类号
E02F5/16
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