| |||
| 正反向计数器; 加减计数器 | |||
| |||
| 两向计数器; 正反向计数器 | |||
| 双向计数器 | |||
|
backward- forward counter : 8 phrases in 5 subjects |
| Agriculture | 2 |
| Computers | 1 |
| Information technology | 1 |
| Metallurgy | 2 |
| Technology | 2 |
| |||
| 正反向计数器; 加减计数器 | |||
| |||
| 两向计数器; 正反向计数器 | |||
| 双向计数器 | |||
|
backward- forward counter : 8 phrases in 5 subjects |
| Agriculture | 2 |
| Computers | 1 |
| Information technology | 1 |
| Metallurgy | 2 |
| Technology | 2 |