我刊在四卷三期曾发表了「三年来我们对於铁铸件缩孔问题的体会」一文。本文是继该文以后再一次详述了在铸造生产中,控制铸铁质量的经验介绍,说明在实际操作中所碰到的问题。其所採用的有效措施,在试验中的实际例子有力地证明了质量改进的效果,因此介绍出来,以供读者们参考並推广应用。 I published in the fourth issue of the fourth volume has published “three years we experience the problem of shrinkage of iron castings” article. This article is the article after the details of once again in the casting production, the quality of the experience of the introduction of cast iron to illustrate the problems encountered in the actual operation. The effective measures adopted in the experiment, the actual examples of the test proved the quality of the effect of the improvement, and therefore introduced to readers for reference and promote the application.