Description
Speed–Time–Distance Calculator: an easy-to-use slide rule that lets you work out the missing value when you know the other two (speed, time elapsed, or distance travelled). The outer sleeve is made from high-impact plastic.
Portland Speed-Time-Distance Calculator (Rule)
£9.23
Speed–Time–Distance Calculator: an easy-to-use slide rule that lets you work out the missing value when you know the other two (speed, time elapsed, or distance travelled). The outer sleeve is […]
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