我们必须避免机加工后在铸件商产生气孔。你们现在使用的铸钢是什么等级的？对于我方来说17级是最好的。
We need to avoid the air holes in the casting which appear after machining. What grade casting steel do you use?, for us grade 17 should be best.
本文以阶梯形铸件对铸钢件进行了悬浮浇注实验，研究了悬浮剂加入量对铸件凝固特性的影响。
In this paper the experiments of suspension pouring of steel castings are carried out with step casting samples.
论述了普通铸钢、铸铁件用的覆膜砂、非铁合金铸件用的易溃散覆膜特种性能覆膜砂。
The coating sand for cast iron and cast steel and collapsible coating sand for nonferrous alloy casting are also described.
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