英文關鍵字
action
activity
and
area
backhoe
bucket
building
bulldozer
business
busy
checks
commercial
construction
development
digging
dirt
district
drawings
dump
earth
engineer
equipment
estate
grader
hands
heavy
industrial
industry
land
machine
machinery
man
mover
moves
moving
part
real
road
sand
scoop
stop
stops
the
tool
tractor
truck
vehicle
wheel
work
yellow