A composition with some practical value was put forward. And properties of protecting metalpenetration by the coating were also dealt with in the article.
提出了具有一定的实用价值的配方，对涂料防止粘砂的特性进行了论述。
2
The additive of correcting metalpenetration for green sand mold casting, made from the waste of oil further fabricated——namely DK material, is researched in this paper.
研制了利用植物油深加工后的废料———DK材料作为铸造用湿型砂防粘砂添加剂。
3
The sloping metal ceiling panels free of penetration s read as a sweeping airfoil structure that floats above the space, drawing passengers along its arcing central spine.