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发明名称
摘要
申请公布号
JPS5311856(Y2)
申请公布日期
1978.03.31
申请号
JP19720039629U
申请日期
1972.04.03
申请人
发明人
分类号
E03B7/00;F16L58/00;G01M3/16;G01M3/18;(IPC1-7):F16L58/00
主分类号
E03B7/00
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