density control

例句：

1. 1.The density control system is designed to regulate the distribution of materials in the production process.
   密度控制系统旨在调节生产过程中材料的分布。
2. 2. The engineer used a density control device to adjust the density of the mixture.
   工程师使用了一个密度控制装置来调整混合物的密度。
3. 3. The density control measures were implemented to reduce waste and improve efficiency.
   实施了密度控制措施以减少浪费并提高效率。