464.ACM机( )ACM( )

　定期补加滑油Regularly add lubricating oil

　视情补加滑油Depending on the situation adding oil

　使用空气轴承,无滑油supported by air-bearings,no need of oil lubrication

答案解析

正确答案：C

解析：

ACM机( ) ACM( ) 答案: C. 使用空气轴承，无滑油解析: ACM（Air Cycle Machine）是一种空气循环机，用于飞机的空调和温控系统。选项C指出ACM使用空气轴承，无需润滑油，这是正确的。ACM使用空气轴承来支撑旋转部件，而不需要传统的滑油润滑。

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