thread chasing machine

例句：

1. 1. This thread chasing machine isvery useful for sewing.
   这台线追逐机对于缝纫非常有帮助。
2. 2. The engineer designedthe machine to improve productivity.
   工程师设计了这台机器以提高生产效率。
3. 3. The companyhas been using this machinein their production line for years.
   这家公司多年来一直在生产线上使用这台机器。