This article introduces a roll eddy current detecting operating principles, equipment composition, functions and the role and effectiveness of roller.

介绍了轧辊涡流检测设备的工作原理，设备组成，功能以及在轧辊方面的作用和效果。

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The influences of cooling rate of the mould, pouring temperature, nodularity and chemical composition on hardness of roll body were described, and the measures for solve problems were proposed.

对铸型冷却速度、浇注温度、球化率和化学成分对辊身硬度的影响进行了论述，并提出了解决问题的措施。

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The step form, footwork, hand type, method, leg, jumping, balance, or flutter, roll routine techniques, such as composition.

由步型、步法、手型、手法、腿法、跳跃、平衡、跌扑、滚翻等技法组成套路。

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