The independent testing bodies, American Society of Sanitary Engineering and Canadian Standards Association, have validated the valve's primary and preventative functions.
The independent testing bodies, American Society of Sanitary Engineering and Canadian Standards Association, have validated the valve's primary and preventative functions.
独立的检测机构，美国卫生工程协会和加拿大标准协会，对于阀门的主要性能和预防性能进行检测认证。