输气 管 : 107 phrases in 19 subjects |
Agriculture | 2 |
Automobiles | 1 |
Aviation | 3 |
Company name | 4 |
Consulting | 1 |
Drilling | 3 |
Economy | 1 |
General | 4 |
Hydroelectric power stations | 2 |
Metallurgy | 2 |
Nursing | 3 |
Oil / petroleum | 22 |
Racing and motorsport | 1 |
Refrigeration | 1 |
Reproductive biology | 5 |
Steel production | 1 |
Surgery | 2 |
Technology | 48 |
Telecommunications | 1 |