escapements

1.擒纵机;(钟,表等的)司行轮,摆轮;(打字机等上面的)棘轮装置

2.〈罕〉逃跑;〈古〉逃路,出口

1.in a clock or watch, a mechanism that permits motion in only one direction, allowing power from a spring or falling weight to turn gears connected to the hands

2.in a piano, a mechanism that allows the hammer to rebound from a string after striking it

3.in a typewriter or printer, a mechanism that regulates the relative movement between the paper carrier and the typing or printing position on a line