 |
| |||
| 双向计数器; 可逆计数器 | |||
| 正反向计数; 加减计数器 | |||
| |||
| 可逆计数器; 双向计数器指前后向计数器 | |||
| |||
| 双向〔正反向，可逆〕计数器 | |||
| 双向计数器 | |||
| forward backward counter: 5 phrases in 3 subjects |
| Agriculture | 2 |
| Business | 1 |
| Technology | 2 |
|
| |||
| 双向计数器; 可逆计数器 | |||
| 正反向计数; 加减计数器 | |||
| |||
| 可逆计数器; 双向计数器指前后向计数器 | |||
| |||
| 双向〔正反向，可逆〕计数器 | |||
| 双向计数器 | |||
| forward backward counter: 5 phrases in 3 subjects |
| Agriculture | 2 |
| Business | 1 |
| Technology | 2 |