英文關鍵字
agricultural
auger
bore
borehole
boring
building
clay
construction
development
dig
digger
dirt
drill
driller
drilling
earth
engineering
equipment
excavate
excavation
exploration
extraction
foundation
geodesy
geological
ground
groundwork
heavy
high
hole
hydraulic
industrial
industry
machine
machinery
measurement
mining
outdoor
rig
site
soil
spiral
steel
structure
technician
testing
tool
work
worker