First principles of mechanical and engineering drawing (1897)
Holt-Butterfill, H · London : Chapman & Hall · leaf 104
1 92 FIRST PRINCIPLES OF No. 3, the various points, ordinates, etc., of No. 4, as given in No. 5.Its elevation is then obtained by producing the projectors drawnthrough the points a, 1, 2, 3, 4, BC, No. 3, and intersecting them bythose drawn through the corresponding points in the plan No. 5. Aline…
Mechanical drawing
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