 |
开孔壁
| 风洞
| 开孔壁 | |
| space | perforated wall |
| 风洞 | |
| compr. | air channel |
| hydroel.st. | whirl tube |
| racing | wind hole |
| space | air-tunnel; tunnel |
| |||
| perforated wall | |||
| 开孔壁: 3 phrases in 2 subjects |
| Plastics | 1 |
| Wind Energy | 2 |