Sleeve axis is always perpendicular to railway sleepers, ensuring quick and accurate alignment. The average working efficiency is 1.5 times that of double end wrench.

套筒轴线始终垂直于轨枕面，对位快速、准确，平均工作效率为双头的1.5倍。

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In terms of time efficiency, the U.S. Department of Transportation estimates that people spend on average 52 minutes each working day commuting.

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