| |||
| active area | |||
| active surface | |||
| face of tooth; flank; tooth flank; tooth surface | |||
| wind collector | |||
| active surface (of ultrasonic head); effective irradiation surface (of ultrasonic head) | |||
|
surface active : 12 phrases in 6 subjects |
| Chemistry | 1 |
| Earth sciences | 2 |
| Information technology | 1 |
| Metallurgy | 6 |
| Natural resourses and wildlife conservation | 1 |
| Transport | 1 |