游标卡尺是一种测量长度的工具,在米尺上附加一个可滑动的刻有若干分度的游标尺即可组成游标卡尺,其游标尺上分格数一般有1 0格、2 0格和5 0格三种,它可以把米尺的精度提高到0 .1mm、0 .0 5mm或0 0 2mm .如果要求测量长度精确到毫米以下,并且测量的长度不超过2 0cm ,那么就可 The vernier caliper is a tool for measuring the length. A sleek caliper can be formed by attaching a sliding vernier ruler with a number of graduations on the metre. The vernier scales generally have 10, 20 and 50 scales. For the three types, it can increase the accuracy of the metre to 0.1 mm, 0.5 mm, or 0.02 mm. If the measurement length is required to be accurate to less than a millimeter, and the measured length does not exceed 20 cm, then