How To Characterize Surface

: DRAWING AND ITS UTILITY

Suppose we commence simply with straight lines. How shall we determine the character of the surface of the material between the two straight lines shown in Fig. 125? Is it flat, rounded, or concaved? Let us see how we may treat the surface by simple lines so as to indicate the configuration.









































"top"> Fig. 128. Fig. 129.
Fig. 128. Fig. 129.
Fig. 130. Fig. 131.
Fig. 130. Fig. 131.






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