The design object is changed from the technical system to the human-machine system (human-technical subsystem-technical process-operation environment system).
把设计对象由技术系统上升到人机系统，即人—技术子系统—技术过程—作业环境系统。
The design object is changed from the technical system to the human-machine system (human-technical subsystem-technical process-operation environment system).
把设计对象由技术系统上升到人机系统，即人—技术子系统—技术过程—作业环境系统。
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