运行时冗长控制：log4j记录程序和附加程序的冗长等级可以在系统启动时配置，并随后在运行时修改。
Runtime verbosity control: the verbosity level of log4j loggers and appenders can be configured at start time and then modified at run time.
控制计算机控制系统的运行状态，并记录系统运行过程中的一些信息。
Controlling computer controls the operation state of the system, and records some information produced at the running process.
改造后的控制系统可监视主要设备的运行状态和生产数据，控制工艺参数，记录或查询相关数据；
The converted control system can monitor the operation state and performance index of main equipment, control operation parameters, record and inquire relevant data.
改造后的控制系统可监视主要设备的运行状态和生产数据，控制工艺参数，记录或查询相关数据；
The converted control system can monitor the operation state and performance index of main equipment, control operation parameters, record and inquire relevant data.
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