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针对制冷装置用压力容器无损检测进行底片评定时出水渍的底片较多这一问题，介绍一种简易、有效的方法进行解决。
Aiming at the problem that there is a large number of negatives of water stains in the non-destructive testing of pressure vessels in refrigeration equipment during film evaluation, a simple and effective method is introduced to solve the problem.