機器
boring
building
car
city
construction
dirt
dirtied
dirty
discover
drill
drilling
earth
ecology
engine
engineering
equipment
geologic
geology
ground
hole
house
industrial
industry
mine
mineral
people
pipe
pump
research
rig
road
rock
sample
sampling
search
service
site
soil
strong
summer
survey
technology
test
testing
tool
truck
vehicle
wheel
work