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发明名称
摘要
申请公布号
JPS4831612(U)
申请公布日期
1973.04.17
申请号
JP19710074020U
申请日期
1971.08.18
申请人
发明人
分类号
F16L9/22;(IPC1-7):F16L9/20
主分类号
F16L9/22
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代理人
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地址
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