By the method of sawing and saw blade swing taking the line of saw-teeth of saw blade's working side for centre, saw blade always works toward the tangent of sawing curve.

采用锯机连同带锯条一起以带锯条工作边锯齿齿尖连线为中心作回转摆动的方法，实现带锯条始终沿着锯切曲线的切线方向进行锯切。

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There are many methods to measure the circular curved line in circuitry construction survey. Angle offset method and tangent offset method are usually used.

在线路施工测量中，圆曲线测设方法有很多，通常采用偏角法或切线支距法。

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The new method is called welded line tangent method which forms a kinematics model for the robot operating in the bent degree based on the judgment of the tacking system.

该方法是根据焊缝跟踪系统判断焊缝的弯曲程度，确定机器人的运动学模型。

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