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发明名称
摘要
申请公布号
JPS5481609(U)
申请公布日期
1979.06.09
申请号
JP19770155287U
申请日期
1977.11.21
申请人
发明人
分类号
F16L9/14;E02F5/18;E21D9/06;(IPC1-7):E02D29/10
主分类号
F16L9/14
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