| 1. | Double check detector assembly backflow preventor
双重检验检测器组合防回流装置 |
| 2. | Check detector seals , and replace as necessary . clean or replace detector jets as necessary
检查检测器密封垫，如有必要就替换。如有必要清洗或替换检测器喷嘴。 |
| 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。 |
