Decimal and Millimeter Equivalents

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Metric measurements may be set off directly on drawings with the metric scale. Decimal measurements may be set off directly on drawings with the engineers’ scale or the decimal scale.

Symbols for Instructors’ Corrections

C

Show construction

D

Show dimensions; show given or required data

I

Improve form or spacing

H

Too heavy

NH

Not heavy enough

ND

Not dark enough

SL

Sharpen pencil or compass lead

GL

Use guidelines

A

Improve arrowheads

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Error in circled area

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