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发明名称
摘要
申请公布号
NL6912819(A)
申请公布日期
1970.02.25
申请号
NL19690012819
申请日期
1969.08.22
申请人
发明人
分类号
F16K1/226;F16K1/42;(IPC1-7):F16K1/22
主分类号
F16K1/226
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