| 1. | Double check valve backflow - prevention assembly
双止回阀防回流组件 |
| 2. | A double check valve assembly shall be installed at each noted location
双止回阀总成应该安装在每个指定的位置。 |
| 3. | Series 719 double check valve assembly shall be installed at each noted location
系列719双止回阀总成应该安装在每个标注的位置上。 |
| 4. | The double check valve assembly shall be a watts regulator company series 774x
这种双止回阀总成应该是美国瓦茨调节阀公司系列774x 。 |
| 5. | Watts series 709 double check valve may be installed in either a vertical or horizontal position
美国瓦茨系列709双止回阀可以安装在垂直或水平位置上。 |
| 6. | Compressed air equipment for rail vehicles - double check valves - installation and companion dimensions
铁路车辆用压缩空气装置.双止回阀.安装和连接尺寸 |
| 7. | Series 774x double check valve assemblies are designed to prevent the reverse flow of polluted water from entering the potable water system
系列747双止回阀总成用于防止污水回流进入饮用水系统中。 |
| 8. | Series 774 double check valve assemblies are designed to prevent the reverse flow of polluted water from entering into the potable water system
系列747双止回阀总成用于防止污水回流进入饮用水系统中。 |
| 9. | Series 775 double check valve assemblies provide protection of the potable water supply for non - health hazard cross - connections
系列775双止回阀总成防止交叉连接处非健康危害的流体污染饮用水供应系统。 |
| 10. | Series ss007qt stainless steel double check valve assemblies provide protection of the potable water supply for non - health hazard cross - connections
系列ss007qt不锈钢双止回阀总成为非健康危害交叉连接处的饮用水提供保护。 |
