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发明名称
摘要
申请公布号
JPH0218988(U)
申请公布日期
1990.02.08
申请号
JP19880098080U
申请日期
1988.07.25
申请人
发明人
分类号
E04B5/48;F16L3/24;(IPC1-7):F16L3/24
主分类号
E04B5/48
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代理人
主权项
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