只能采用具有四圈以上的美国国家软管(NH)螺纹的、通过认证的软管水龙头或软管连接件。
Use only with approved hose bibbs or hose fittings having four or more full American National hose (NH) threads.
标准B2.4 -这个标准控制美国尼必可软管连接螺丝螺纹。
A. N. s. I. standard b2.4-this standard controls NIBCO hose coupling screw threads.
系列8是一种独特的真空断路阀，专用于使移动式软管连接到软管螺纹上。
Series 8 is a line of unique vacuum breakers specially made to permit the attachment of portable hoses to hose thread faucets.
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