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關注：1
2013-05-23 12:21
求翻譯：15.超聲波工作時1M范圍噪音小于50分貝（循環泵和風機除外）是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
15.超聲波工作時1M范圍噪音小于50分貝（循環泵和風機除外）
問題補充： |
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2013-05-23 12:21:38
15.1M range noise while ultrasound is less than 50 DB (except for circulating pumps and fans)
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2013-05-23 12:23:18
ultrasonic work 15 .1M scope when noise of less than 50 decibels (circulation pump and wind machine)
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2013-05-23 12:24:58
When 15. ultrasonic wave work the 1M scope noise is smaller than 50 decibels (circulating pump and air blower exception)
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2013-05-23 12:26:38
15.1M range noise while ultrasound is less than 50 DB (except for circulating pumps and fans)
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2013-05-23 12:28:18
15.1M range noise while ultrasound is less than 50 DB (except for circulating pumps and fans)
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