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申请公布号
JPS53134223(U)
申请公布日期
1978.10.24
申请号
JP19770040134U
申请日期
1977.03.31
申请人
发明人
分类号
F16L21/00;E21D9/06;(IPC1-7):F16L21/00;E02D29/10
主分类号
F16L21/00
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