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发明名称
摘要
申请公布号
JP2691947(B2)
申请公布日期
1997.12.17
申请号
JP19900204724
申请日期
1990.08.01
申请人
发明人
分类号
F16L11/12;(IPC1-7):F16L11/12
主分类号
F16L11/12
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代理人
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