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Multiview Orthographic Projection (ref). Watch out for hidden lines and center lines. First and Third Angle Projection. 第一角法與第三角法. A reference system of two viewing planes, horizontal and vertical. These planes partition 3D space into 4 quadrants, which are labeled I, II, III, and IV.
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First and Third Angle Projection 第一角法與第三角法 • A reference system of two viewing planes, horizontal and vertical. • These planes partition 3D space into 4 quadrants, which are labeled I, II, III, and IV.
1st angle projection (France, USSR, China)VS.3rd angle projection (US, Japan, Taiwan)