英文關鍵字
alloy
aluminum
background
bright
cargo
close
clothing
consumerism
detail
dump
eco
ecology
factory
fire
flat
garbage
heap
industrial
industry
iron
junk
leftover
litter
man
mess
metal
obsolete
polluted
pollution
pressed
processing
production
raw
recyclable
recycle
recycling
separation
sort
sparks
steel
technology
tool
tram
transportation
trash
uniform
welding
wheel
worker