听觉保护
Acoustics Pure tone air conduction threshold audiometry For hearing conservation purposes The value of the threshold strain is determined by calibrating the coating.
GB/T7583-1987声学纯音气导听阈测定听力保护用阈值应变的数值是靠对涂层进行标定测出来的。
As a result of careful checking and testing, Acoustics Pure tone air conduction threshold audiometry For hearing conservation purposes
我念给您听:通过仔细的检查和测验,GB/T7583-1987声学纯音气导听阈测定听力保护用
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