102.
Some traditional board drafters preferred the drafting machine over the parallel straight edge because it could be used without the need for _________.

106.
To insure that everyone understands what the electrical symbols represent it is customary to include a ________ on the electrical sheet.

107.
This allows the performance of structures to be analyzed and tested efficiently, accurately, and quickly:

109.
When positioning this feature of perspective projection, the centerline of the cone of visual rays should be directed toward the approximate center of the object:

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