NASA NTRS · 19750000172
Trimetric Scale for Drafting Machines
Abstract
Device allows three basic projections to be drawn from a single scale zero setting. Ellipse proportions are included for convenience. Axonometric projections can also be determined.
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Ryan, J. C., Chu, R.. 1975-08-01. Trimetric Scale for Drafting Machines. https://ntrs.nasa.gov/citations/19750000172
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