The operational environment in this paper includes.
本文中使用的操作环境包括。
The principle of optimizing the operational environment.
优化运行环境原则。
Have low noise, and create quiet and comfortable operational environment.
低噪音，创造安静、舒适的作业环境。
Have low noise, and create quiet and comfortable operational environment.
低噪音，创造安静、舒适的作业环境。
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