空运转试验时,普通机床和精密机床的噪声应不大于( )。 A. 75dB B. 80dB C. 85dB D. 90dB

作者: rantiku 人气: - 评论: 0
问题 空运转试验时,普通机床和精密机床的噪声应不大于( )。 A. 75dB B. 80dB C. 85dB D. 90dB
选项
答案 C
解析 精密机床和普通机床的噪声不大于85dB,高精度机床噪声应不大于75dB。

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