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申请公布号
JPS547002(U)
申请公布日期
1979.01.18
申请号
JP19770079412U
申请日期
1977.06.17
申请人
发明人
分类号
E02D7/26;E21B7/00;(IPC1-7):E02D17/14
主分类号
E02D7/26
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