two- way system : 20 phrases in 13 subjects |
Armored vehicles | 2 |
Communications | 1 |
Construction | 1 |
General | 1 |
Mass media | 1 |
Military | 1 |
Programming | 2 |
Rail transport | 1 |
Sakhalin | 1 |
Seismology | 2 |
Technology | 3 |
Telecommunications | 2 |
Weapons of mass destruction | 2 |