Checking operation of door handle.
检查车门把手的操作性能。
File Manager (FM) : the checking order's operation jurisdiction, completes finally to the order processing.
文件管理模块(FM)：核实命令的操作权限，最终完成对命令的处理。
File Manager (FM) : the checking order's operation jurisdiction, completes finally to the order processing.
文件管理模块(FM)：核实命令的操作权限，最终完成对命令的处理。
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