As to the common perpendicular plane of the two planes, some discussionis made in detail.
关于两平面的公垂平面，也作了详细的说明和论证。
So it's still perpendicular to the same plane.
所以这个外积还是垂直于同一个平面。
So, how do we find this vector that's perpendicular to the plane?
所以，我们要怎么找，垂直于这个平面的向量？
Well, it's the direction that's perpendicular to this plane.
它其实是朝垂直于平面的方向。
Z points toward the sky and is perpendicular to the ground plane.
值朝向天空方向，与地面垂直相交。
For section displays, the cutting plane is assumed to be perpendicular to this line.
为显示指定一个浏览方向，切割平面假设与这条线垂直。
The plumB line is always perpendicular to the horizontal plane.
铅垂线总是垂直于水平面的。
The plane perpendicular to another line or plane through the origin.
与已知直线或平面垂直的平面；
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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