What is the maximum sound level of the toy is accepted?
你认为玩具所发出的声音最高是多少分贝?。
The study was undertaken using a sound level meter operated by a passenger in each car tested.
研究用这样的方式进行:每辆接受测试的汽车的乘客开启声音强度测试仪。
Invalid pump operation is often disturbance caused by sound level measurement and indicator diagram for diagnosis.
无效的泵运转常是气干扰造成的,可通过声波液面测量和示功图进行诊断。
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