sandy gravelstratum

• 砂卵石

sandy gravelstratum的用法和样例：

例句

1. Through laboratory tests on sandy pebble soil by using the dynamic triaxial test, researches of saturated sandy pebble soil have been done.
   摘要通过对砂卵石土室内动三轴试验，对饱和砂卵石土的动力特性进行了较为深入地研究。