The electrical device used on the axle of a spool or reel to provide electrical continuity between the rotating reel core and the stationary reel chassis.

在卷轴或卷筒的轴上所用的电装置。它用来在旋转的卷筒心子与固定的卷筒架之间提供电气连接。

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Critical rotating speed, a basis for determining the rigidity and rotating speed of the main axle, is an important parameter in the design and manufacture of woodwork machine tool.

临界转速是木工机床设计与制造的一个主要参数，为确定木工机床主轴刚度、主轴转速的依据。

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ZPY rotating disc aerator is a horizontal axle type aerator.

ZPY转碟曝气机是卧轴式曝气设备。

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