USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 3/TASK 1
and the other in 64ths), with the scales on the reverse side running in the
opposite direction.
There are rules which have both an inch scale and
millimeter scale, making this type rule adaptable to work involving both
systems of measurement.
Another feature on some rules is a scale etched
across the end of the rule, facilitating measurement in restricted places.
FIGURE 163.
TYPE OF STEEL RULES.
(a) Flexible Rule.
A flexible rule is made of thin, tempered
spring steel, permitting it to be bent over a rounded surface.
215
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