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发明名称
摘要
申请公布号
JPS5743366(B2)
申请公布日期
1982.09.14
申请号
JP19780115389
申请日期
1978.09.20
申请人
发明人
分类号
B23C3/30;E21B17/00;E21B43/08
主分类号
B23C3/30
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代理人
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