Folding metre ruler for straight measurement of an object has ruler sections fastened to swivel on each other with a measurement scale on their facing side.

摘要

A folding ruler has ruler sections fastened to swivel on each other with a measurement scale on their facing side. When the ruler is folded up, the measurement scale begins with 1 (II(1)) on the inner side and with 199 (II(2)) on the outer side.