lift roller
... 19 衬板Liner 20 纵向滚轮Lift roller 21 侧向滚轮Side roller ...
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该桶支撑在与辊道接合的多个滚轮上并绕桶的纵向轴线旋转。
The tank is supported and rotated about its longitudinal axis on a plurality of rollers that engage the roller track.
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