ethanal or paraldehyde,methanal and urotropine;
醛或三聚醛、甲醛、六次甲基四胺;
ethanal or paraldehyde,methanal and urotropine;
醛或三聚醛、甲醛、六次甲基四胺;
For Group B, the vitalight lamp radiation and steaming of methanal plus PP were used in combined air sterilization.
紫外线灯照射与甲醛加PP熏联合空气消毒为B组。
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