機器
backhoe
boat
canal
construction company
construction industry
construction site
construction work
crawler excavator
deepen
deepening
digging
dredger
dredging
equipment
excavation
excavator
expand
fairway
floating
grab
green
hydraulic
hydraulics
infrastructure
inland navigation
mud
pontoon
river
river bed
river deepening
ship
shipping
shovel
sludge
swimming
water
water depth
waterway
work
working