Improving of material, dimension, heat-treatment, construction form on the chain of bucket conveyor are introduced, then increase service life of bucket conveyor.

通过对斗式提升机链条的材质、尺寸、热处理、结构形式的改进，从而提高了其使用寿命。

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The paper reviews the process from ring chain type bucket elevator to plate chain bucket elevator and indicates the strength calibration of driving wheel axle.

本文重点论述了环链式斗式提升机改造成板链式斗式提升机的过程及驱动轮轴的强度校核。

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The well was in the back porch, broad and deep, with a bucket, chain, and windlass.

屋后的走廊里有一口又大又深的井，配有水桶、链条和辘轳。

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The amount of sq inches they will purchase from the supply chain will make what they buy for iPhones and iPads seem like a drop in the bucket.

FORBES: Another Key Reason for Apple to Get Into the TV Business