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经营范围
发明名称
摘要
申请公布号
JPS5548869(Y2)
申请公布日期
1980.11.14
申请号
JP19750008986U
申请日期
1975.01.17
申请人
发明人
分类号
F16L21/00;E03C1/122;(IPC1-7):F16L21/00
主分类号
F16L21/00
代理机构
代理人
主权项
地址
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