APPARATUS FOR PREVENTING RETURN-FLOW OF LIQUID FROM A RECEPTACLE SUPPLIED UNDER PRESSURE BY A SUPPLY NETWORK BACK INTO THE LATTER
申请公布号:US3455324(A)
申请号:USD3455324
申请日期:1966.04.08
申请公布日期:1969.07.15
发明人:RUDOLF BIERI;HANS BIERI
分类号:E03C1/10;E03D5/02;E03D9/08;(IPC1-7):E03C1/10
主分类号:E03C1/10