发明名称 Rubber flap for gas pipeline, has pressure spring placed through hole in main pipeline through adapter so that gas discharge is temporarily closed in pipeline
摘要 <p>The flap has a pressure spring placed through a hole in a main pipeline through an adapter so that gas discharge is temporarily closed in pipeline.</p>
申请公布号 NL1036086(C2) 申请公布日期 2009.09.10
申请号 NL20081036086 申请日期 2008.10.17
申请人 ANTONIUS WILHELMUS JOSEPHUS VAN DEN BOOGAARD 发明人 ANTONIUS WILHELMUS JOSEPHUS VAN DEN BOOGAARD
分类号 F16L55/16 主分类号 F16L55/16
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