英文關鍵字
accessory
action
automatic
bending
chain
closeup
continuos
control
craft
creation
creativity
detail
device
dimension
electricity
electromechanical
energy
engine
equipment
factory
force
gold
goldsmith
indoor
industrial
industry
inside
instrument
jewelery
machine
manufacturing
mechanic
mensuration
metal
motion
moves
object
power
precious
product
production
recycle
ring
rotates
run
safety
spin
work
workshop
worksite