valvula de cierre : 66 phrases in 14 subjects |
Agriculture | 1 |
Automated equipment | 2 |
Automobiles | 1 |
Chemistry | 4 |
Earth sciences | 7 |
Ecology | 1 |
Electronics | 5 |
General | 1 |
Materials science | 2 |
Mechanic engineering | 12 |
Metallurgy | 3 |
Pest control | 1 |
Technology | 18 |
Transport | 8 |