| |||
base surface | |||
subgrade surface |
поверхность основания : 15 phrases in 13 subjects |
Antennas and waveguides | 1 |
Construction | 3 |
Economy | 1 |
Horse racing | 1 |
Hydraulic engineering | 1 |
Mathematics | 1 |
Mechanic engineering | 1 |
Metallurgy | 1 |
Oil / petroleum | 1 |
Pumps | 1 |
Road works | 1 |
Robotics | 1 |
Technology | 1 |