距离功能：累积里程表，行程距离，中间距离。
Distance functions: cumulative odometer, trip distance, and intermediate distance.
负载和气缸可绕铰轴在一个平面内摆动，气缸长行程时，建议采用中间铰轴式。
The load and air cylinder can swing round the pin in a plan, if the stroke is long, adopt the intermediate fixed or movable trunnion type.
一个中间球笼允许对大约一半的铁路长度的延伸，既创造了总行程的方向。
An intermediate ball-cage allows for extension of approximately half the rail length in both directions creating a total stroke.
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