Bajie: we can build rolling line as well to make more profit!
八戒：我们还可以建轧钢生产线，赚更多的钱！
A line generated by a point on a circle rolling along a straight line.
一个圆上的某个点在该圆顺着一条直线旋转时形成的线。
On line length measurement of steel tube is the key point for continuous rolling.
钢管管材长度的在线检测是实现热连轧的基础。
Rolling direction perpendicular to the plane of the bus for the straight line roller.
在垂直于滚动方向的平面内的母线为直线的滚道。
Rolling direction perpendicular to the plane of the bus for the straight line roller.
在垂直于滚动方向的平面内的母线为直线的滚道。
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