The drying of wet polymer particles with solvent recovery is an operation which may see wide use in the plastics industry. 干燥濕的聚合物顆粒并把溶劑回收是在塑料工業(yè)中有廣泛用途的一種操作。
Which of the following is purpose of the drying process used in penetrant testing? 下列幾條中，哪一條是滲透試驗中進(jìn)行干燥處理的目的？
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