機器
environmental
aerial
cast
coal
digger
earth
earthmoving
energy
engineering
environment
equipment
excavation
fossil
fuel
geological
geology
ground
heavy
industrial
industry
layer
load
loading
machinery
mechanical
mine
minerals
miners
mining
moving
natural
new zealand
nonrenewable
nz
open
opencast
outdoors
outside
pit
power
resources
seam
south island
stockton
strata
stratum
trucks
west coast
westland
worker
working