Method 1 clean surface with aqueous cleaning solution, apply passivation paste to surface, rinse surface with DI water until traces of chemicals are removed.
方法1：用水清洁溶液清洁表面，向表面应用钝化剂，用去离子水冲洗表面直到全部除去化学试剂的痕迹。
Make up 3-10% aqueous solution and clean the greasy dirt by soaking, brushing or ultrasonic wave method, choosing the right cleaning temp and time according to user's conditions.
配成3 - 10%的水溶液，采用浸泡，超声波或擦刷方法，根据用户的实际条件，选用适宜的清洗温度和清洗时间。
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