The formula for calculating the average crack growth rate of 840d wheel web hole is presented.

给出了840d车轮辐板孔平均裂纹扩展速率的计算公式。

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The Railway wheel generated fatigue cracks at the wheel web plate holes, which would arouse safe servicing problem.

铁路货车轮在辐板孔处产生疲劳裂纹，影响安全运行。

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The fracture surfaces of 840d wheel web with a hole have been investigated and the intervals of fatigue line also have been measured.

对840d车轮辐板孔疲劳断口形貌进行观察并测量疲劳弧线间距。

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The sender can go onto UPS' Web site and learn that the package has been received even before the driver has gotten back behind the wheel of his truck.

FORBES: Logistics in Brown