ruler
A ruler is a flat piece of wood or metal, used for measuring short distances (mostly 20-50 centimetres depending on the ruler, with most American rulers being one foot/12 inches long). It frequently appears in classrooms or engineering sites.
A ruler is a flat piece of wood or metal, used for measuring short distances (mostly 20-50 centimetres depending on the ruler, with most American rulers being one foot/12 inches long). It frequently appears in classrooms or engineering sites.
