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1·Reducing the defective index of the cast iron vane, the invention is also favorable for improving the fan efficiency.

降低了铸铁叶片的废品率，同时也有利于提高发风扇效率。

2·The phenomenon that the crack defect at jaw hole during baking process of carbon anode vertically charged in baker causes the defective index of carbon anode rise.

在焙烧过程中，竖装阳极出现爪孔缺陷的现象是导致阳极生产废品率增多及成本居高不下的一个很重要原因。

3·Is the OQA defective level tracked as an index to predicted the outgoing quality level?

是否有OQA不良跟踪作为出货品质反馈？