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Clean the exterior of the equipment and its mounting shelf hardware using a vacuum cleaner and brush.

A用真空清洁器和刷子清洁设备的内部及其底座。

B用真空清洁器和刷子清洁设备的外表面以及安装架。

C真空清洁设备及硬件设施的表面涂层。

正确答案:A (备注:此答案有误)

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