| |||
back valve | |||
counterbalance valve | |||
back-pressure valve; counter balance valve | |||
back pressure valve | |||
foot valve | |||
| |||
back pressure valve | |||
| |||
back-pressure valve |
背压阀 : 12 phrases in 4 subjects |
Automobiles | 2 |
Oil / petroleum | 2 |
Refrigeration | 2 |
Technology | 6 |