claypan是什么意思

用法例句

This paper mainly presents the relations among moisture content density and claygrain content of pebble soil mass of weathered red mudstone of Badong Formation,Middle Trias.

研究了巴东组红色泥岩风化含砾粘土的含水量、密度及粘粒含量与内聚力C、摩擦角的关系。