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发明名称
摘要
申请公布号
JPS4730117(U)
申请公布日期
1972.12.05
申请号
JP19710035982U
申请日期
1971.05.06
申请人
发明人
分类号
F16L37/22;F16L37/00;F16L37/23;(IPC1-7):F16L37/22
主分类号
F16L37/22
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