| |||
butterfly (板) | |||
trunnion valve | |||
butterfly valve | |||
disc valve | |||
butterfly damper (门); butterfly valve (门) | |||
butterfly damper | |||
| |||
butterfly valve | |||
| |||
butterfly gate |
蝶形阀 : 24 phrases in 8 subjects |
Architecture | 1 |
Automobiles | 2 |
Drilling | 1 |
Electronics | 1 |
Hydroelectric power stations | 1 |
Plastics | 1 |
Refrigeration | 7 |
Technology | 10 |