circular equivalent
| of
| rectangular duct
| circular equivalents | |
| refrig. | 圆形当量 |
| of | |
| gen. | 的; …的; 关于 …的; …做成 的; 对…; … 的 |
| rectangular duct | |
| railw. | 矩形风管 |
| |||
| 圆形当量 | |||
|
circular equivalent : 4 phrases in 2 subjects |
| Refrigeration | 3 |
| Technology | 1 |