 |
| |||
| active surface (of ultrasonic head); effective irradiation surface (of ultrasonic head) | |||
| face of tooth; flank; tooth flank; tooth surface | |||
| wind collector | |||
| active surface | |||
| active area | |||
|
surface active : 12 短语, 6 学科 |
| 信息技术 | 1 |
| 冶金 | 6 |
| 化学 | 1 |
| 地球科学 | 2 |
| 自然资源和野生动物保护 | 1 |
| 运输 | 1 |