Universal tracer for Arabic characters - is sheet of thin transparent plastics including all letter forms and punctuation marks

摘要

The tractor is made of flexible, non deformable, plastics and forms two rulers which are transparent. The central part (3) is thin and is surrounded on four sides by a thicker part (2), making all solid. The letters are arranged in order, under different forms and positions (5,6,7,8,9) for the first letter in the alphabet. Punctuation marks (12,13) are included throughout and all the 28 letters of the alphabet are covered. There are also included numbers, calculation and similar signs.