frequency sounding
| method
| frequency sounding abbr. | |
| oil | 频率测深 |
| method abbr. | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 频率测深 | |||
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frequency sounding : 17 phrases in 6 subjects |
| Air defense | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geophysics | 2 |
| Oil / petroleum | 3 |
| Technology | 9 |
| Telecommunications | 1 |