乳液比重计

例句：

1. 1. The milk volumetric balance is used to measure the density of milk.
   乳量计用于测量牛奶的密度。
2. 2. The milk volumetric balance was used to determine the composition of the milk.
   乳量计被用来测定牛奶的成分。
3. 3. The milk volumetric balance was used to calculate the weight of the milk.
   乳量计被用来计算牛奶的重量。