upper and lower
| feed
| upper and low | |
| auto. | 上与下 |
| upper and lower | |
| avia. | 上和下 |
| feed | |
| gen. | 喂; 一餐; 饲[ |
| hydroel.st. | 供给 |
| IT | 馈电; 馈线 |
| mech.eng. | 源源不断地供给，输送 |
| met. | 给料; 进料; 送进 |
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| 上和下 | |||
| 上部和下部 | |||
| |||
| 上与下 | |||
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upper and lower : 69 phrases in 21 subjects |