In his book, the author relied on a simplified method, drawn from the experiences he practiced in teaching this art, so that it would be easy for anyone who is familiar with the principles of science to achieve the desired goal, taking into account the establishment of technical conventions used in the crafts for general public benefit. The method he followed in teaching this art encouraged him to do the work, as he would begin the subject by explaining the technical points in description, drawing, and use, followed by a practical explanation from the factory (workshop) teacher on the same material, along with performing industrial work in application of it. Thus, the students obtained useful information that nurtured the ability to apply knowledge to work.
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