覆盖层
covering
covering layer
cover layer
covering flux
cover soil
mulch
overlay stratum
superjacent bed
cladding
capping layer
Coating
overburden layer
Overburden
CAP
protective coating
draping bed
over laying strata
overlying bed
Earth-cumulic surface horizon
coverage
overburden layers
Cover
upper horizon
superimposed bed
burden
Superstratum
overlay
OVERBREAK
alluvium deposits
blanket
veneer rock
Veneer
mulberry cutting sickle