Watts NLF9 is a patented backsiphonage preventer specially made for laboratory faucets where portable hoses can be attached.
美国瓦茨NLF9是一种具有专利技术的反虹吸防回流阀，特别适用于可连接移动式软管的实验室水龙头。
Watts NLF9 is a patented backsiphonage preventer specially made for laboratory faucets where portable hoses can be attached.
美国瓦茨NLF9是一种具有专利技术的反虹吸防回流阀，特别适用于可连接移动式软管的实验室水龙头。
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