back reflection
| ring
| back reflection | |
| jewl. | 背反射 |
| oil | 背面反射; 背射 |
| tech. | 后反射; 背射法 |
| ring | |
| gen. | 戒指 |
| auto.ctrl. | 环状单元 |
| econ. | 瑞恩 |
| hydroel.st. од. | 环 |
| interntl.trade. | 交易场; 垄断集团 |
| |||
| 背反射 | |||
| 背面反射; 背射 | |||
| 后反射; 背射法 | |||
| |||
| 背反射; 回射 | |||
|
back reflection : 23 phrases in 7 subjects |
| Air defense | 1 |
| Chemistry | 1 |
| Electronics | 2 |
| Metallurgy | 12 |
| Oil / petroleum | 2 |
| Space | 2 |
| Technology | 3 |