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.
Officials used to have trouble with the foreign names of people passing through Ellis Island, and because they were so busy, many people's names got changed in the rush.