另外，本文还针对聚丙烯生产过程中的关键控制环节——聚合反应的控制参数及控制方式进行了优化。
In addition, this article has been optimized the key in the polypropylene production process -the control parameter and control method.
剪刃位置控制是高速线材生产中所使用的启停式飞剪的关键控制环节，其控制精度的高低直接影响到飞剪的正常工作。
It's very important that accurate position of the edge of start stop shear to high speed wire mill production. Shear would run by accurate controlled.
这样的一个点或环节或步骤或工序就是关键控制点。
Such a point or link or step or process is the critical control points.
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