卡钳,测径器,两脚规,卡尺(用于测量管子、圆形物体的直径)an instrument with two long thin parts joined at one end, used for measuring the diameter of tubes and round objects (= the distance across them)
a pair of callipers
一把测径规
2.
[c][usupl]
双脚规形夹(支撑无力或受伤的腿的金属支架)a metal support for weak or injured legs