ethylene purification
... 乙烯基树脂漆 vinyl resin paint 乙烯精炼 ethylene purification 乙烯制冷剂循环 ethylene refrigerant cycle ...
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在工作场所，他们的母亲接触过诸如甲苯、二甲苯、矿物精炼物、异丙醇和三氯乙烯等有机溶剂。
In the workplace, their mothers had come into contact with such solvents as toluene, xylene, mineral spirits, isopropyl alcohol and trichloroethylene.
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