Essentials of Mechanical Drafting: Elements, Principles, and Methods, with Specific Applications in Working Drawings of Furniture, Machine, and Sheet ... A Manual for Students (Classic Reprint) - Tapa blanda

Sinopsis

ESSENTIALS OF MECHANICAL DRAFTING CHAPTER I INTRODUCTION 1* Nature fund Uses of ^Mechanical Drafting, M^echanical drafting or mechanical drawing is the art of making the conventional representations used by engineers, architects, and inventors in working out and recording the details of their constructive designs, and the means by which ideas of the exact form or shape, dimension, and arrangement of parts in objects of a structural character are universally expressed and made intelligible to others. Mechanical drafting enables constructive work of any kind to be earned on with accuracy and economy of time and material, and takes the place of lengthy verbal description w^hich would fail to express with clearness and exactness the definite information recjuired by the workman. It will be seen from Fig. 179 that certain general peculiarities of the form and structure of an object may be understood from an ordinary pictorial representation, but that it cannot show the exact form, siz

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