| |||
球形单向阀; 球形截流阀 | |||
球形逆止阀; 球阀; 止回球阀; 球形逆止阀 |
ball check valve : 47 phrases in 12 subjects |
Architecture | 1 |
Automobiles | 5 |
Aviation | 1 |
Chemistry | 1 |
Drilling | 4 |
Ecology | 1 |
Engineering geology | 1 |
Ice hockey | 2 |
Oil / petroleum | 5 |
Oil processing plants | 1 |
Plastics | 3 |
Technology | 22 |