桶滚(Barrel Roll），是从战机行进路线而来的，桶滚不仅是飞行特技，也是一种攻守兼备的机动动作。飞机匀速飞行并用旋转和速度，画以螺旋的方式。
滚动加工过程是在滚桶滚动中清洁或磨擦工件，可用或不用研磨材料。
Tumbling . Tumbling is the process of cleaning or abrading parts in a rotating container , either with or without cleaning or abrasive materials .
再一次，你可能误以为是我们在说那出现在马术比赛上的标准无聊的滚桶比赛，当然不是。
Once more, you might (wrongly) think we're talking about the standard boring barrel racing on rodeo with horses and stuff like that, but no.
低磨擦系数导轨，保证滚桶重量完全作用于床垫上。
Low friction coefficient guides to ensure that the barrel weight fully to the mattress.
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