機器
belt
brine
colliery
concrete
conveyance
core
crude
crush
crushed
crusher
dig
dust
equipment
factory
far
geology
gravel
ground
hard
industrial
industry
loads
long
machinery
material
metal
mineral
mining
open pit
outcrop
pebble
plans
pollute
quarry
rubble
sand
skirt
steel
stone
technology
transport
transportation
twirl
water