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。
2
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。
3
The specification of programmable controller, PLC hardware configuration, software design, programmer, operation mode and furnace purging flame detection and it principle are presented concretely.