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发明名称
摘要
申请公布号
NL7117539(A)
申请公布日期
1972.06.27
申请号
NL19710017539
申请日期
1971.12.20
申请人
发明人
分类号
F16J3/02;F16K7/00;F16K7/12;(IPC1-7):F16K7/00;F16J3/00
主分类号
F16J3/02
代理机构
代理人
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