optical data
| relay
| optical data | |
| tech. | 光学资料; 光学数据 |
| Relay | |
| space | 中继 |
| relay | |
| el.mach. | 电气继电器; 继电器 |
| forestr. | 分程传递 |
| hydroel.st. од. | 继电器 |
| interntl.trade. | 转送; 补充; 接替 |
| met. | 替续器; 中继站 |
| |||
| 光学资料; 光学数据 | |||
|
optical data : 68 phrases in 13 subjects |
| Aviation | 8 |
| Communications | 2 |
| Computers | 1 |
| Earth sciences | 2 |
| Electronics | 20 |
| Information technology | 3 |
| Materials science | 1 |
| Multimedia | 1 |
| Shipbuilding | 1 |
| Space | 11 |
| Technology | 13 |
| Telecommunications | 4 |
| Television | 1 |