Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 16
a plane parallel to the plane of projection, any point in theline will move in a plane parallel to this plane and to the planeof projection. A method used to great advantage in practical work is asfollows: In Fig. 16, Ab is the H projection of AB. Bb, theprojecting line of B, is perpendicular to… … r/G. /6
Projection
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