The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies.
TK - DL可以检测压力真空断路阀，减压防回流阀或双止回阀总成。
Designed to test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies, allowing you to eliminate both pressure and differential test gauges.
适用于检测压力真空断路阀，减压防回流阀或双止回阀总成，不再需要压力表和压差表。
The following Test Procedure is one of several that is recognized throughout the United States for verification of the functioning of backflow preventers.
下列检测程序是几种美国公认的防回流阀功能检测程序之一。
The following Test Procedure is one of several that is recognized throughout the United States for testing Backflow Preventers.
下列检测程序是美国检测防回流阀通用的几种检测程序中的一种。
The National Fire Protection Agency (NFPA) Guidelines require a confirming flow test to be conducted whenever a "main line" valve such as the shutoff valves or a backflow assembly have been operated.
美国国家防火协会（NFPA）指导原则要求对于主管线上运行的阀门，如关闭阀或防回流阀总成，必须进行流量测试。
The echocardiogram is a painless test that's used to look for prolapse of the mitral valve flaps and for backflow (regurgitation) of blood through the leaky valve.
这项检查没有痛苦，主要用于检查二尖瓣的脱垂和血液通过渗漏二尖瓣的反流情况。
The echocardiogram is a painless test that's used to look for prolapse of the mitral valve flaps and for backflow (regurgitation) of blood through the leaky valve.
这项检查没有痛苦，主要用于检查二尖瓣的脱垂和血液通过渗漏二尖瓣的反流情况。
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