Technology language for s... ... Safety valves 安全阀 Screw connection 螺纹接头 Self closing valve 自闭阀 ...
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Cock screw 紧定螺钉
brass screw down bib cock 黄铜水龙头
pallet cock screw 叉夹板螺钉
balance cock screw 摆夹板螺丝
screw cock
螺丝旋塞
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Designed to prevent the flow of contaminated water back into the potable water supply, these devices require no plumbing changes, and screw directly onto a sill cock.
其功能在于防止污染水回流到饮用水供应系统中，这些装置不需要对改变管线，只需要直接螺纹旋在洒水龙头上即可。
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