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| 射频能由电磁波通过空气、液体或固体传递的电频谱内的能，频率范围为 300KHz radio300GHz。在理想条件下，通常在空气中,有可能激发电雷管。因此，国家主管部门颁布了由发射器至电雷管的安全距离〈随能量和波长而定〉 | |||
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| 射频能 | |||
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| 射频能量 | |||
| radio frequency energy: 3 phrases in 3 subjects |
| Air defense | 1 |
| Aviation | 1 |
| Space | 1 |
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