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发明名称
摘要
申请公布号
BE719740(A)
申请公布日期
1969.02.03
申请号
BED719740
申请日期
1968.08.21
申请人
发明人
分类号
F16L11/15;F16L59/125;F16L59/153
主分类号
F16L11/15
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代理人
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地址
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