阻流器 meaning in Chinese

bean
choke
flow plug

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
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 - 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