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| sound transmission | |||
| sound transmission Passage of a sound wave through a medium or series of media (通过媒介或系列媒体传递的声波。) | |||
| propagation of sound; transmission of sound | |||
| 声 音 传播: 18 phrases in 7 subjects |
| Architecture | 1 |
| Automobiles | 1 |
| Aviation | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Refrigeration | 3 |
| Technology | 10 |