Babbit, Arthur B · New York, H. Holt and company · leaf 138
lower right. SECTIONAL VIEWS 125 Group 4. Section lines; very light, black lines. Finer than any other line of the drawing. Group 5. Margin lines; heavy lines, with black ink.When these are made the same sizeas the object lines, they should be inkedwith Group 1. PLATE 12 Copy the two views shown in…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
