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.
Here and here. And I can only move my arm as much as this.
这儿和这儿。我只能这样摆动手臂。
Their feet were fixed to one bar and their hands to another bar.
他们的脚拴在一根铁杠上,他们的手拴在另外一根铁杆上。
At the time of his death, one person praised him as follows: Future generations, it may be, will hardly believe that such a person as this walked upon this earth.