With the help of the vector method, the general expressions for the displacement, velocity and acceleration of the polished nod on the swing horsehead pumping unit(SHPU)was introduced.

用矢量法导出了旋转驴头式抽油机悬点运动的位移、速度和加速成度的表达式。

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With the help of the vector method, the general expressions for the displacement, velocity and acceleration of the polished nod on the swing horsehead pumping unit(SHPU)was introduced.

用矢量法导出了旋转驴头式抽油机悬点运动的位移、速度和加速成度的表达式。

youdao