分级挥发
Staged volatilization
以上为机器翻译结果，长、整句建议使用 人工翻译 。
结果各样品中易挥发的主要成分为甲苯、丁酮、汽油、醋酸乙酯、丙酮等，其急性毒性分级均为低毒。
Results Those samples ingredients easy to volatilize were mainly toluene, butanone, gasoline, ethyl acetate, acetone, etc. All of them were rated as low toxic for their acute toxicity.
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