The first and second bends additionally cooperate to form a helical roller track on the outside of the tank.

此外，第一和第二弯曲协作以在桶的外侧形成螺旋状辊道。

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The first and second bends additionally cooperate to form a helical roller track on the outside of the tank.

此外，第一和第二弯曲协作以在桶的外侧形成螺旋状辊道。

youdao