機器
浜辺
action
bucket
build
building
bulldozer
canal
construction
development
difficult
digger
digging
dredging
duty
engineering
equipment
excavation
excavator
expand
harbor
heavy
hydraulic
industrial
industry
land
loader
machinery
marine
mining
pile
power
reclamation
release
removing
scoop
sea
seashore
severity
sewage
shore
shovel
soil
stone
stormy
tractor
transportation
water
work