垫底材料；
1. 七彩网.英语单词
1. 垫底材料：bedding glide == 顺层冲断层,顺层滑动,层面冲断层 | bedding material == 垫底材料 | bedding mortar == 垫层砂浆
2. bedding material的解释
noun
1. material used to provide a bed for animals
Synonym: beddinglitter
