Mechanical drawing; a treatise on the drawing of mechanical and machine details (1920)
Jones, Franklin Day, 1879-1967 · New York, The Industrial press; [etc., etc.] · leaf 113
as though IOO MECHANICAL DRAWING cut in two along its diameter on the line ab. This line shouldbe a dash-and-dot line, as shown, and not a solid one. Oneof the uses of a dash-and-dot line is as a center line where apiece is symmetrical, and its use here would indicate that thehalf of the wheel not… … r~\
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
