Some Characteristic Properties of Parallel <svg style="vertical-align:-0.36pt;width:11.2875px;" id="M1" height="11.0625" version="1.1" viewBox="0 0 11.2875 11.0625" width="11.2875" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.022,-0,0,-.022,.062,10.55)"><path id="x1D467" d="M475 445l-64 -69q-119 -128 -289 -280q27 6 81 -15q66 -26 102 -26q48 0 111 93l23 -19q-41 -84 -75.5 -116.5t-73.5 -32.5q-37 0 -147 53q-43 21 -63 7q-22 -15 -38 -41q-4 -7 -11 -7q-8 10 -8 26q0 38 47 83l292 273q-32 -5 -67 -1q-63 7 -105 7q-32 0 -53.5 -22
t-47.5 -67l-25 13q15 39 38 78q40 66 83 66q57 0 120 -12q52 -10 80 -10q29 0 67 42z" /></g></svg>-Equidistant Ruled Surfaces

Mathematical Problems in Engineering

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Figure 1

Figure 1: Some Characteristic Properties of Parallel <svg style="vertical-align:-0.36pt;width:11.2875px;" id="M1" height="11.0625" version="1.1" viewBox="0 0 11.2875 11.0625" width="11.2875" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.022,-0,0,-.022,.062,10.55)"><path id="x1D467" d="M475 445l-64 -69q-119 -128 -289 -280q27 6 81 -15q66 -26 102 -26q48 0 111 93l23 -19q-41 -84 -75.5 -116.5t-73.5 -32.5q-37 0 -147 53q-43 21 -63 7q-22 -15 -38 -41q-4 -7 -11 -7q-8 10 -8 26q0 38 47 83l292 273q-32 -5 -67 -1q-63 7 -105 7q-32 0 -53.5 -22
t-47.5 -67l-25 13q15 39 38 78q40 66 83 66q57 0 120 -12q52 -10 80 -10q29 0 67 42z" /></g></svg>-Equidistant Ruled Surfaces 

Mathematical Problems in Engineering

Some Characteristic Properties of Parallel -Equidistant Ruled Surfaces

Figure 1