提高轧管机主机头运动稳定性对改善钢管的轧制质量有着较大的影响。

Improving the motion stability of the main head of tube rolling mill has great influence on improving the rolling quality of the tube.

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机头移动和进给均采用直线轴承运动副。

Cutting head movement and feed are used linear bearing motion pair.

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升降舵，铰连在水平安定面后缘上的可动部件。用以操纵飞机的俯仰运动(机头朝上及朝下)。

ELEVATOR, a hinged moveable part on the trailing edge of the horizontal stabilizer for airplane pitch (nose up and nose down) control.

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