1. Incoming material inspection: after the arrival of the goods, general appearance and size quality inspectors conduct random inspections according to the inspection level II AQL=0.01 (defective ratio ≤ 1%); mechanical thread performance according to AQL=0.05 (defective ratio ≤ 5%) conduct random inspections . When the defective ratio is out of tolerance, the quality inspector needs to notify the supplier to deal with it accordingly.
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