Before operation, special consideration must be given to pressure limitations, system containment, purging requirements, etc., to determine if additional safety measures are required.
在操作前，必须对压力极限、系统容积、净化要求等专门考虑，以决定是否要求额外的安全措施。
Purging cached files causes those files to downloaded again the next time that they are required. This increases the amount of time required to complete the operation.
清理缓存文件会导致下次再次需要这些文件时重新下载，这样会增加完成这些操作的时间。
The specification of programmable controller, PLC hardware configuration, software design, programmer, operation mode and furnace purging flame detection and it principle are presented concretely.
具体介绍了可编程序控制器性能指标，PLC硬件配置，软件设计，编程器，操作方式以及炉膛吹扫，火焰检测及火检原理等。
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