2021/4/24,SCUT,1,3.6 The method to clamp the workpiece and obtain the desired accuracy,3.6.1 The clamping (1) Positioning and clamping by direct location(直接找正定位） When putting the workpiece directly on the machine bed, the operator can locate the machined surface by using a micrometer（千分尺） inspecting instrument（测量仪）, marking dish（划线盘） or straight rules to adjust and find the desired machining position relative to the cutting tool,It is usually used in single or small batch type production, or in
