機器
aerial
bin
coal
digger
dolomite
earth
earthmoving
energy
engineering
environment
environmental
equipment
excavation
fossil
fuel
geological
geologist
geology
ground
industrial
industry
island
load
loaded
machinery
machines
mechanical
mechanics
mine
minerals
miners
moving
natural
outdoors
outside
progress
prosperity
resource
resources
ropeway
screens
transport
transportation
truck
work
working