hoppertube

例句：

1. 1.The engineer was tasked with designing the new hopper tube for the machine.
   工程师被指派负责设计这台机器的新管状部件。
2. 2. The scientist used a hopper tube to collect samples from the volcano.
   科学家使用一个管状部件从火山采集样本。
3. 3. The construction workers were using a hopper tube to transport sand from one side of the dam to the other.
   建筑工人正在使用一根管状部件将沙石从一个堤坝的一侧转移到另一侧。