| |||
king valve | |||
master valve | |||
main valve |
总阀 : 31 phrases in 11 subjects |
Automobiles | 4 |
Aviation | 1 |
Compressors | 2 |
Drilling | 1 |
Hydroelectric power stations | 1 |
Metallurgy | 6 |
Navigation | 1 |
Oil / petroleum | 5 |
Rail transport | 1 |
Refrigeration | 1 |
Technology | 8 |