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发明名称
摘要
申请公布号
JPS56977(U)
申请公布日期
1981.01.07
申请号
JP19790082768U
申请日期
1979.06.15
申请人
发明人
分类号
F16L21/06;F16L7/00;(IPC1-7):F16L21/06
主分类号
F16L21/06
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代理人
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