品质类
qualified products, up-to-grade products良品
defective products, not up-to-grade products不良品
defective product box不良品箱
poor processing 制程不良 ,
qualified products, up-to-grade products良品
defective products, not up-to-grade products不良品
defective product box不良品箱
poor processing 制程不良 ,

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