ultrasonic echo
| method
| ultrasonic echo | |
| shipb. | 超声回声 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 超声回声 | |||
| 超声波回声 | |||
|
ultrasonic echo : 12 phrases in 6 subjects |
| Business | 2 |
| Earth sciences | 1 |
| Geophysics | 1 |
| Mining | 1 |
| Plastics | 1 |
| Technology | 6 |