drum type concrete mixer

例句：

1. 1. The constructionsite needed a new drum type concrete mixer to improve productivity.
   施工现场需要一台新的鼓式混凝土搅拌机来提高生产效率。
2. 2. Theengineer decided to replace the old drum typeconcrete mixer with a more efficient model.
   工程师决定用更高效的型号替换旧的鼓式混凝土搅拌机。
3. 3. Thedrum type concrete mixerwas used to mix and pourthe fresh concrete for the building's foundation.
   鼓式混凝土搅拌机被用来混合和浇筑建筑基础的新鲜混凝土。