機器
alloy
bulldozer
bulldozing
construction
copyspace
crane
cropped
disposable
disposing
dump
dumping
dumpsite
empty
environmental
environmentalist
equipment
excavator
garbage
ground
heap
heavy
industrial
industries
industry
iron
junkyard
lifestyle
machinery
machines
manufacturing
mess
metal
metallic
metals
no
nobody
one
pollution
recycle
recycling
refuse
rubbish
scrapyard
steel
trash
two
urban
vehicle
vehicles