英语语法分析

Using thin, wide ingate and chill can prevent the shrinkage defect, and improve casting yield by 3%.

采用薄、宽的内浇道和冷铁工艺消除了飞轮铸件的缩孔缺陷，铸造工艺出品率提高3%；

The paper introduced the parameter optimization and construction method of smooth blasting of horse-head ingate.

文中详述了马头门光面爆破参数的优化及施工方法。

The general procedures for constructing subway are as follows: first excavate the shaft, then horizontal pass, finally ingate.

地铁施工中一般采取先竖井继而横通道后开马头门进行正线施工的施工工序。