engine-room noise level 中文意思是什麼
engine-room noise level
解釋
機艙噪聲電平-
Without any control, the noise level outside the engine room can be 70 to 80 db ( a ) or even higher. homemade dgeu of the same power produces more noises
在不經過治理的情況下,機房外環境噪聲為70 ~ 80db ( a )或更高,相同功率參數的國產機組噪聲則更大些。
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