機器
activity
area
backhoe
building
bulldozer
concrete
construction
crack
crane
crusher
debris
demolishing
demolition
derelict
destroy
destruction
detritus
dig
dirt
dismantling
down
dust
equipment
excavate
excavation
excavator
exterior
hammer
heavy
hydraulic
industrial
industry
iron
large
machinery
metal
old
power
reinforced
remains
ruin
site
steel
structure
transport
waste
wood
work
wreck