英文關鍵字
arm
background
carpentry
circle
closeup
construction
cut
cutting
development
disk
engineer
fabrication
flash
force
hand
hard
human
industrial
isolated
machinery
male
man
manufacturing
metal
metalwork
operator
part
people
pipe
power
production
protection
round
saw
sawing
sparks
spin
splash
stainless
steel
steering
tool
tube
welder
welding
work
worker
working
workshop