| 1. | Back siphonage backflow vacuum breakers
倒虹吸回流真空关闭阀
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| 2. | Main anti - siphonage pipe
总反虹吸管
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| 3. | The figure 85 and 90m are designed to employ an integral back - flow prevention device to prevent potential back - siphonage
型号85和90m结构上配置一个一体式防回流装置，用以防止潜在的反虹吸现象。
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| 4. | Series 800m4fr is designed to prevent back - siphonage of contaminated water under continuous pressure into the potable water supply
系列800m4fr用于防止在连续压力下污染水反虹吸进入饮用水供应系统中。
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| 5. | Series n388 represents a new line of vacuum breakers designed to prevent back - siphonage of contaminated water into the potable water supply
系列n388代表新型真空断路阀，适用于防止污染水反虹吸进入饮用水供应系统中。
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