Industrial drawing and geometry; an introduction to various branches of technical drawing (1911)
Spooner, Henry John, 1856- · London, New York [etc.] Longmans, Green, and co. · leaf 123
Pig. 308.—Section giving ellipse. … Fig. 309.—Sectiongiving triangle. Pia. 310.—Sectiongiving circle. five different figures or sections of a cone (called conicsections) due to cutting planes, according to their different positions. The section will be atriangle if the cutting plane pass through the apex of the cone and any part of…
Mechanical drawing · Geometrical drawing
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