This document discusses different types of measuring tools used for semi-precision measurement, including tape measures, steel rulers, and their graduations. It explains that tape measures are used to measure lengths of 3 feet or more, while steel rulers have finer graduations down to fractions of an inch like 1/32 or 1/64 of an inch. The document also demonstrates how to read measurements on both sides of a steel ruler, which may be graduated differently, and provides examples of measuring techniques and exercises.
