定期检查: 28 phrases in 16 subjects |
Automobiles | 1 |
Aviation | 5 |
Business | 3 |
Chemistry | 1 |
China | 1 |
Electronics | 1 |
Finances | 1 |
General | 1 |
Hydroelectric power stations | 2 |
Planning | 1 |
Securities | 1 |
Space | 3 |
Sports | 1 |
Technology | 4 |
Textile industry | 1 |
United Nations | 1 |