Devices to prevent pollution by backflow of potable water - air gap with submerged feed incorporating air inlet plus overflow - family a , type c 防饮用水回流污染装置.带浸入式给水装有空气进口和溢流口的气隙. a类c型
Devices to prevent pollution by backflow of potable water - air gap with submerged feed incorporating air inlet plus overflow - family a , type c 防饮用水回流污染装置.带浸没式给水并装有空气进口和溢流口的气隙. a类c型
Devices to prevent pollution by backflow of potable water - controllable backflow preventer with reduced pressure zone - family b , type a ; german version en 12729 : 2002 饮用水防回流污染设备.带减压区的可控回流防止器. b系
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
Devices to prevent pollution by backflow of potable water - air gap with submerged feed incorporating air inlet plus overflow - family a , type c ; german version en 13078 : 2003 防饮用水回流污染装置.带浸没式给水装有空气进口和溢
Devices to prevent pollution by backflow of potable water - air gaps with minimum circular overflow verified by test or measurement - family a , type g ; german version en 14623 : 2005 防饮用水回流污染的装置.带最小圆形溢流口的气隙
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
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
