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【多选题】
在( )情况下更有必要采用传导式的真空冷冻干燥器A.
当物料不能耐受高温或在高温下易氧化
B.
物料干燥时易产生粉末
C.
必须回收物料汽化出的蒸汽
D.
物料有爆炸性危险
E.
高黏度物料
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
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