结果表明：铸件表面光洁，无砂眼、气孔等缺陷，铸件合格率高于90%；
The defects of sand-slag and gas-hole are absent in the water-cooling-sprayer whose surface is clean and qualified rate is more than 90%.
阐述了铸件成品率与金属炉料有效率、铁液利用率、工艺出品率、铸件合格率四个比率的关系，指出了铸件成品率与铸造生产的全过程有关。
The relationship between casting yield and effective rate of metal charge, usage ratio of molten iron, technology yield and pass rate of castings were surveyed.
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