1、硬粘土
... gumbo粘泥 gumbotil硬粘土 gumformingcompound成胶化合物 ...
2、胶水土
... 胶黏土 gutta-percha clay 胶水土 gumbotil 胶态的 colloidal ...
3、坚韧灰泥
...坚韧的；困难的 tough (l04)坚韧的指甲 ruddy and hard nails坚韧灰泥 gumbotil ...
4、风化底碛土
...土 soil; earth风化底碛土 gumbotil碛土 morning glory spillway ...