The drying of wet polymer particles with solvent recovery is an operation which may see wide use in the plastics industry. 干燥湿的聚合物颗粒并把溶剂回收是在塑料工业中有广泛用途的一种操作。
Which of the following is purpose of the drying process used in penetrant testing? 下列几条中,哪一条是渗透试验中进行干燥处理的目的?