Page 60 - ENGINEERING DRAWING
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6. Dimensions should be taken from visible outlines rather than from hidden
lines.
Figure 4.4 : Marking the dimensions from the visible outlines
7. No gap should be left between the feature and the start of the extension line.
Figure 4.5 : Marking of extension lines
8. Crossing of center lines should be done by a long dash and not a short dash.
Figure 4.6 : Crossing of center lines
