primary calibration
| method
| primary calibration | |
| oil | 主刻度 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 主刻度 | |||
|
primary calibration : 5 phrases in 4 subjects |
| Aviation | 1 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 1 |