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acknowledge request; acknowledgement request |
требование подтверждения : 20 phrases in 10 subjects |
Aviation | 1 |
Finances | 1 |
Firefighting and fire-control systems | 1 |
General | 2 |
Mass media | 3 |
Military | 1 |
Occupational health & safety | 1 |
Oil / petroleum | 2 |
Programming | 7 |
Quality control and standards | 1 |