at factory

例句：

1. 1. The company is located at the factory in downtown.
   这家公司位于市中心的工厂。
2. 2.The workers are busy at the factory every day.
   工人们每天都在工厂忙碌着。
3. 3.The factory produces a variety of products for different markets.
   这家工厂为不同的市场生产各种产品。