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发明名称
摘要
申请公布号
JPS63104489(U)
申请公布日期
1988.07.06
申请号
JP19860195921U
申请日期
1986.12.22
申请人
发明人
分类号
E21D9/06;F16L1/024;(IPC1-7):E21D9/06;F16L1/02
主分类号
E21D9/06
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