Approved by the foundation for cross - connection control and hydraulic research at the university of southern california 通过位于美国南加州大学内的美国交叉连接控制和水利研究基金会的认证。
Series 775 double check valve assemblies provide protection of the potable water supply for non - health hazard cross - connections 系列775双止回阀总成防止交叉连接处非健康危害的流体污染饮用水供应系统。
As complied from documented foundation for cross - connection control and hydraulic research at the university of southern california lab tests 获得位于美国南加州大学内的交叉连接和水研究基金会的认证。
cross-connection meaning:[Architecture] 1. A connection between two otherwise separate piping systems, one containing potable water and the other water which may be contaminated. 2. In a fire-protection system, a piping conne...cross-connection перевод:матем. перекрёстная [взаимная] связь