Meanwhile, analyze the experimental result, do attack experiment use natural soil, air-drysoil, stoving soil and preparation seil, observe the difference.
The EPA says that it is during the cleaning, purification, and waste disposal phases of dry cleaning that these hazardous toxins can get into our air, water, and soil.
环保局说，这是在清洗，纯化和废物处置阶段，干洗，这些有害毒素可以进入我们的空气，水和土壤中。
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A new pile-driven technology named air curtain drysoil withdrawal can reduce resistance of a sinking pipe by withdrawing soil from the pipe and installing air curtain on the outside of pipe.