fixed hopper

例句：

1. 1.The machine has a fixed hopper for feeding the material.
   这台机器有一个固定的料斗用于喂料。
2. 2.The engineer designed the fixed hopper to hold more than 500 pounds of sand.
   工程师设计了这个固定料斗，可以存放超过500磅的沙子。
3. 3.The workers were instructed to dump the waste into the fixed hopper before starting the machinery.
   工人们被指示在启动机械之前将废料倒入固定料斗。