frequency reference
| number
| frequency reference abbr. | |
| tech. | 基准频率 |
| number abbr. | |
| bridge. | 大宕分 |
| econ. | 号 |
| interntl.trade. од. | 数目 |
| met. | 数值 |
| radio.amat. | 数字 |
| stat. | 总计; 个数 |
| tech. | 号数; 数字 |
| tech. од. | 数 |
| |||
| 基准频率 | |||
| 基淮频率; 参考频率 | |||
|
frequency reference : 29 phrases in 13 subjects |
| Agriculture | 1 |
| Air defense | 2 |
| Automobiles | 1 |
| Aviation | 1 |
| Electricity | 1 |
| Electronics | 7 |
| Hydroelectric power stations | 1 |
| Mathematics | 1 |
| Oil / petroleum | 1 |
| Piezoelectric crystals | 1 |
| Space | 6 |
| Technology | 2 |
| Telecommunications | 4 |