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precise result2.角度的測量 Measure angle圖4. 測量角度的方法Fig. 4 Method of angle measuring3.零件壁厚的測量 Measure wall thickness圖5. 測量壁厚的方法Fig. 5 Method of wall thickness measuring4.高度和深度的測量 Measure height and depth(1)高度和深度尺寸用直尺測量 Measure height and depth using ruler圖6. 高度和深度尺寸用直尺測量的方法Fig. 6 Measure height and depth using ruler(2)高度和深度尺寸用卡尺測量 Measure height and depth u