boulder
bulldozer
car
cart
color
construction
cutting
digging
drilling
earth
effort
engineering
equipment
excavation
front
heap
heavy
industry
loading
machinery
madrid
milling
mine
mineral
mining
mover
object
pebble
pit
power
quarry
quarrying
removing
rock
shovel
size
sky
slope
stone
strength
technology
temperature
truck
vehicle
working
yellow