sector type
| relay
| sector-type | |
| tech. | 扇形 |
| 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 |
| |||
| 扇形 | |||
|
sector type : 7 phrases in 3 subjects |
| Desert science | 1 |
| Electric machinery | 1 |
| Technology | 5 |