vernier caliper

vernier-caliper的词性：
n.（名词）

1. A measuring instrument consisting of an L-shaped frame with a linear scale along its longer arm and an L-shaped sliding attachment with a vernier, used to read directly the dimension of an object represented by the separation between the inner or outer edges of the two shorter arms.
游标卡尺：一种测量仪器，由一个在其较长臂上刻有成比例的刻度的L型框架以及一个带有游标尺的可滑动L型附件构成，用来直接读出由两个较短臂的内边或外边之间的间隔显示的某物的尺度