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Sequel of the Relation between Two Lines Space Angle and Its Projective Angle

XU Li juan (Heilongjiang Communications College, Harbin 150050)  
The two intersected lines form a space angle. The projective angle of which will change with the change of the location of the two lines. With the basic geometric theory, the paper reveals the essential condition of the projective angle being right angle when the two lines forming the space right. Angle is not parallel with any projective surface.
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