英文關鍵字
bobbin
brush
circle
coil
compress
construction
fabricate
factory
foundation
grey
industrial
industry
iron
large
line
machine
manufacture
metal
mill
motion
movement
plant
pressure
process
production
reel
rod
roll
rolling
round
silver
spiral
spool
spring
steel
suspension
tool
transformer
wire
workshop
wrap
wraping
wring