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。

youdao

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。

youdao