Babbit, Arthur B · New York, H. Holt and company · leaf 132
is represented bydotted lines on the former and by full hnes on thelatter. Also note that portions of the horizontallines representing the lower part of the upper flangeand the upper part of the lower flange have beenomitted on the sectional view. It is common prac-tice to omit the dotted hnes.… … 1 1 1 1 11 ^9- ^^3
Mechanical drawing
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