| 1. | Performance requirements for backflow preventer with intermediate atmospheric vent
有中气压通风口的防回流装置的性能要求 |
| 2. | Dn 10 - dn 20 . c d devices to prevent pollution by backflow of potable water - pipe interrupter with permanent atmospheric vent dn 10 to dn 20 - family d , type c
防止饮用水回流污染的装置.带恒定大气压力孔的管阻流器 |
| 3. | Devices to prevent pollution by backflow of potable water - pipe interrupter with permanent atmospheric vent dn 10 to dn 20 - family d , type c ; german version en 14453 : 2005
防饮用水回流污染的装置.带恒定大气压力孔的管阻流器 |
| 4. | Devices to prevent pollution by backflow of potable water - pipe interrupter with atmospheric vent and moving element dn 10 to dn 20 - family d , type b
防饮用水回流污染的装置.带大气压力孔和移动元件的管阻流器dn10至dn 20 . b型d系列 |
| 5. | Devices to prevent pollution by backflow of potable water - pipe interrupter with atmospheric vent and moving element dn 10 to dn 20 - family d , type b ; german version en 14452 : 2005
防饮用水回流污染的装置.带大气压力孔和移动元件的管 |
| 6. | The 9d dual check with atmospheric vent is designed for use on non health hazard , continuous pressure , point of use applications for protection against backsiphonage and backpressure
带排气口的9d双止回阀适用于非健康危害、持续压力应用场合，用于防止反虹吸和反压力。 |
