英文關鍵字
axle
bobbin
brass
cable
coil
control
copper
counter
detail
display
electric
electromagnetic
energy
engineering
equipment
factory
fibers
flywheel
industrial
industry
large
machine
magnet
magnetic
manufacturing
material
motor
person
production
pulling
reel
rotate
round
shaft
shiny
spool
spools
table
technology
thin
thread
tool
turning
winding
wire
wiring
worker
working
yarn