 |
| |||
| 脚阀 | |||
| 进水阀 | |||
| 脚踏板操纵阀 | |||
| 脚踏阀 | |||
| 脚底止回阀 | |||
| 底部阀; 吸水阀; 止回阀; 管底阀; 脚踏阀; 泵吸管端逆止阀; 背压阀 | |||
| 底阀 | |||
| |||
| 泵吸管端逆止阀; 脚阀; 尾阀; 吸入端止回阀 | |||
| foot valve: 13 phrases in 4 subjects |
| Chemistry | 1 |
| Ecology | 1 |
| Hydroelectric power stations | 1 |
| Technology | 10 |
|
| |||
| 脚阀 | |||
| 进水阀 | |||
| 脚踏板操纵阀 | |||
| 脚踏阀 | |||
| 脚底止回阀 | |||
| 底部阀; 吸水阀; 止回阀; 管底阀; 脚踏阀; 泵吸管端逆止阀; 背压阀 | |||
| 底阀 | |||
| |||
| 泵吸管端逆止阀; 脚阀; 尾阀; 吸入端止回阀 | |||
| foot valve: 13 phrases in 4 subjects |
| Chemistry | 1 |
| Ecology | 1 |
| Hydroelectric power stations | 1 |
| Technology | 10 |