英文關鍵字
abstract
background
bolt
broken
chrome
closeup
concepts
construction
engineering
equipment
february
flat
group
hardware
heart
human
industrial
industry
iron
key
lapse
love
lovers
machine
many
marriage
mechanic
motion
nail
nut
object
passion
repair
romantic
rusty
shape
single
spanner
steel
stop
strength
supplies
symbol
time
tool
valentines
washer
white
wrench