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发明名称
摘要
申请公布号
JPS5212373(Y2)
申请公布日期
1977.03.18
申请号
JP19740119968U
申请日期
1974.10.04
申请人
发明人
分类号
F16L59/06;E02D29/12;E02D29/14;(IPC1-7):E02D29/12
主分类号
F16L59/06
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