| 1. | 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。 |
| 2. | There shall be no brass or bronze parts used within the check valve assembly
在止回阀总成内不应该采用黄铜或青铜部件。 |
| 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. | 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。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | 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。 |
| 9. | Only those cross - connections identified by local inspection authorities as non - health hazard shall be allowed the use of an approved double check valve assembly
只有那些经过当地审查主管部门认定的交叉连接才允许采用双止回阀总成。 |
| 10. | Double check valve assembly shall be installed at each noted location to prevent the unwanted reversal of polluted water into the potable water supply
双止回阀总成应该安装在每个值得注意的位置，用于防止污水出现不需要的回流而流进饮用水供应系统中。 |
