英文關鍵字
quarry
rock
dump
pit
extraction
mineral
reservoir
construction
sewage
containment
solution
accumulation
tank
purity
soil
sieve
work
material
resource
extract
building
container
mechanical
worker
storage
excavator
industry
equipment
industrial
excavate
machinery
earth
sand
dig
ground
loader
truck
activity
power
foundation
engineering
job