air control valve是什么意思

用法例句

The Disturbing Analysis of the Chlorin Ion from the Sampling Case to the Concentration of HCl in the Air;

采样容器溶出氯离子对监测空气中氯化氢的干扰分析

Determination of Volatile Organic Compounds in Environmental Air by Cryo-concentration/GCMS;

预冷冻浓缩系统与气相色谱-质谱联用测定空气中挥发性有机物

Determination of Total Mercury in Air by Atomic Fluorescence Spectrometry;

原子荧光光度法测定空气中的汞