機器
activity
backhoe
brick
building
bulldozer
business
collapse
concrete
construction
debris
deconstruction
demolish
demolished
demolishing
demolition
destroy
destruction
development
dig
dirt
dump
dust
excavator
heavy
house
hydraulic
industrial
industry
iron
loader
machinery
metal
old
power
remove
rubble
ruin
shovel
site
steel
structure
transport
trash
vehicle
waste
work
wreck
yellow