Proctor compaction test

例句：

1. 1. The Proctor compaction test is a method used to determine the strength of soils.
   Proctor压实试验是一种用于确定土壤强度的方法。
2. 2. In this experiment, we conducted a Proctor compaction test on different types of soil.
   在这个实验中，我们对不同类型的土壤进行了Proctor压实试验。
3. 3. The results of the Proctor compaction test were used to optimize the design of the foundation.
   Proctor压实试验的结果被用来优化地基的设计。