功能键：键盘上，一组用来命令电脑进行某个特别功能的键；它通常贴有标签。
Function keys: a set of keyboard keys that are used to command the computer to perform a specific function and are generally labelled.
左侧的命令栏为主要功能键，按检验流程排序。
The main menus on the left side are the function buttons listed in the order of the inspection procedure.
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