| 1. | Reduced pressure detector assembly backflow preventer
减压检测器组合防回流装置 |
| 2. | Double check detector assembly backflow preventor
双重检验检测器组合防回流装置 |
| 3. | Double check detector assembly shall be installed on fire protection systems when connected to a potable water supply
当消防系统连接到饮用水供应系统时，应该安装一个双止回阀总成。 |
| 4. | A double check detector assembly shall be installed on fire protection systems when connected to a potable water supply
当消防系统连接到饮用水供应系统时，应该安装一个双止回阀总成。 |
| 5. | Series 774xdcda double check detector assemblies are designed to prevent the reverse flow of polluted water from entering the potable water supply
系列747xdcda双止回阀检测器总成用于防止污水回流进入饮用水系统中。 |
| 6. | Series 709dcda double check detector assemblies are designed exclusively for use in accordance with water authority containment requirements
系列709dcda双止回阀检测器总成专用于满足水主管部门的密封要求的应用场合。 |
| 7. | Series 774dcda double check detector assemblies are designed for use in accordance with water utility non - health hazard containment requirements
系列747dcda双止回阀总成用于符合自来水公司非健康危害密封要求的应用场合。 |
| 8. | Series 007dcda double check detector assemblies are designed exclusively for use in accordance with water utility authority on non - health hazard containment requirements
系列007dcda双止回阀检测总成专用于符合自来水主管部门非健康危害密封要求的应用场合。 |
| 9. | Series 909rpda reduced pressure detector assemblies are used in health hazard applications and are designed exclusively for use in accordance with water utility authority containment requirements
系列909rpda减压检测器总成用于健康危害应用场合，专门用于符合自来水公司主管部门有关密封要求的应用场合。 |
| 10. | The reduced pressure detector assembly shall consist of two independent torsion spring check modules , a differential pressure relief valve located between and below the two modules , two drip tight shutoff valves , and required torsion spring check modules and relief valve shall be contained within a sleeve accessible single housing constructed from 304 ( sch 40 ) stainless steel pipe with groove end connections
这种减压检测器总成应该包括两个独立扭力弹簧止回阀模块，一个位于两个模块之间的下方的差压安全阀，两个防滴漏关闭阀，并且要求扭力弹簧止回模块和安全阀应该放置在一个套筒内，要易于接近带沟槽连接的304 （目录40 ）不锈钢管的单个外壳。 |
