Veining defects have been effectively prevented and eliminated by improvement on gating system, especially by special additive to core sand and sinter coating on surface of sand core.
通过改进浇注系统，特别是采取在进、排气道芯砂中添加特殊抗脉纹添加剂及在砂芯表面涂刷烧结型涂料等工艺，有效地预防和消除了脉纹缺陷。
The scheme of this essay begins with research of reasonable dosage of additive agent, aims at improve the integrated performance of mixture by enhancing the performance of cement and sand slurry.
从水泥稳定类外加剂的合理剂量的研究着手，以求从改善结合料性质提高水泥稳定类基层的综合路用性能。
The additive of correcting metal penetration 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。
The center pipe is machined from 64mm tubing, and the sand filter is made from silica sand, cement, additive.
滤砂器是根据不同技术标准筛选不同粒度的石英砂、油井水泥、添加剂和水按配比加工压制的。
Through additive selection and formula optimization, the basic composition of sand consolidating fluid (SCF) is established as follows: 5.
通过组分筛选和配方优化，得到固砂液的基本配方为：5。
Through additive selection and formula optimization, the basic composition of sand consolidating fluid (SCF) is established as follows: 5.
通过组分筛选和配方优化，得到固砂液的基本配方为：5。
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