边坡软弱层
slope soft and weak layer
多层软弱地基
multi-layered soft ground
软弱层性态
Characters of weak intercalation
软弱层状围岩
soft layered surrounding rock
(弱)覆盖同余
Weakly) covering congruence
诱导紧覆盖弱紧映射
inductively compact-covering and weakly compact mappings
inductively compact-covering and weakly compact ma
超深覆盖层
supper-deep overburdened layer