土壤气体 meaning in Chinese

soil gas

Its removal draws soil air into the hole .
其拔起的动作会把土壤气体抽入孔中。
Soil gas sampling and analysis at 91 sites , 2235 sampling points
91处场址2235点土壤气体采样及分析。
Soil quality . pollution detection and characterization methods . general guide for soil gas analyses on site used in land screening
土壤质量.污染程度监测和定性分析.土壤筛选监测时使用的现场土壤气体分析一般指南