They invented a device called a microchronometer, which recorded a worker's motions and the amount of time spent doing each motion.
他们发明了一种精密计时设置，可以记录了工人的动作以及在每一个动作上花费的时间。
They invented a device called a microchronometer, which recorded a worker's motions and the amount of time spent doing each motion.
他们发明了一种精密计时设置，可以记录了工人的动作以及在每一个动作上花费的时间。
应用推荐