機器
environmental
brick
building
bulldozer
business
construction
container
demolition
dirty
disposal
dump
dust
environment
equipment
excavation
excavator
garbage
garbage dump
heap
heavy
hydraulic
industrial
industry
iron
junk
junkyard
landfill
loader
machinery
material
metal
old
outdoors
pile
pollution
recycle
recycling
rubbish
rubble
rust
salvage
scrap
stack
steel
trash
vehicle
waste
waste management
wasteland