汽蒸槽是聚丙烯装置扩能改造的关键工艺设备。
Decatizing groove is a key processing component of the polypropylene device.
深冷处理过程中，处理工艺选取和工艺设备是其技术关键。
The selection of the treatment process and device is important for this technique.
对选矿工艺设备配置图的有效描述及算法，是实现选矿厂计算机辅助配置设计的关键问题。
The key problems of the concentrator computer aided layout are how to carry out the effective demonstration and algorithm of the equipment layout of mineral processing.
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