pulley

n 1 (apparatus consisting of a) wheel or wheels with grooves for ropes or chains, used for lifting things 滑轮（组）; 滑车. 2 wheel or drum fixed on a shaft and turned by a belt, used esp to increase speed or power 皮带轮.

pull (sth) up, pull down, pull in, pull into, pull into sth; pull in (to sth), pull off, pull off (sth), pull on, pull out, pull out of the fire, pull sb down, pull sb in, pull through, pull to pieces, pull together, pull up, pull-in, pull-out, pull-up (Brit) (US `pull-off), pullet, pulley-block, Pullman, pullover, pulmonary, pulp, pulpit, pulpy, pulsar, pulsate, pulsation, pulse, pulverization, pulverisation, pulverize, pulverize, pulverise, puma, pumice, pummel (also pommel), pummelling, pump, pump-room,