A Measuring Rule Having the Blade of a Knife

摘要

This design relates to a learning or office ruler that is used for drawing and cutting lines by measuring the length or height, and there was inconvenient to move continuously while using a ruler, and inconvenient to cut with a knife by drawing a line each time with a ruler. Therefore, it is a person whose purpose is to fix it by hand, use a knife without using a separate knife, and remove ink and various foreign substances.