编码描述:sound meter testo 815 for measurement by frequency weighting of the actual value of the sound level, which is the total value of sound energy, the value of which is the value of the value of sound energy, the value of which is recalculated by the method of frequency with the method of frequency of weighting of the actual value of the sound level, which is the total value of sound energy, the value of which is recalculated by the method of frequency no. 编码来源:乌兹别克斯坦原始海关数据 产品标签: apparatus for physical analysis,apparatus for chemical analysis,chemical analysis