英文關鍵字
agricultural
agriculture
auger
bore
borehole
borer
boring
construction
deep
development
digger
dirt
drill
driller
drilling
earth
earthwork
engineering
equipment
excavate
excavation
extraction
field
foundation
geodesy
geologist
geology
ground
heavy
high
hole
hydrogeological
industrial
industry
job
machine
machinery
measurement
metal
mining
outdoor
power
rig
site
soil
spiral
steel
technology
tool
work