frequency multiplication
| method
| frequency multiplication abbr. | |
| space од. | 倍频 |
| method abbr. | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| ★ 倍频 | |||
| 频率倍增; 多倍频率效应 | |||
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frequency multiplication : 12 phrases in 5 subjects |
| Air defense | 3 |
| Electronics | 2 |
| Semiconductors | 1 |
| Space | 2 |
| Technology | 4 |