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| 声音速 | |||
| 声速 (speed of sound, 声音在当地传播的速度，声波在给定介质中的传播速度。在国际标准大气 (ISO )中,声速为761.6mile/h, 1116ft/s, 340：5m/s, 34046.16cm/s 或 1 225. 5 km/h。 声速由介质确定。在空气中，温度将影响密度及声速) | |||
| 声速 | |||
| 声［音］速 | |||
| 音速; 声速 (度); 声波速度 | |||
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sonic speed : 3 phrases in 2 subjects |
| Oil / petroleum | 1 |
| Technology | 2 |
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