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发明名称
摘要
申请公布号
CS177820(B2)
申请公布日期
1977.08.31
申请号
CS19720001433
申请日期
1972.03.03
申请人
发明人
分类号
F16J9/26;(IPC1-7):F16J15/34
主分类号
F16J9/26
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代理人
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地址
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