英文關鍵字
annealing
closes
coated
component
compression
cover
detector
equipment
factory
flame
frame
furnace
gas
gold
hardware
helical
indicator
indoor
industrial
inside
instrument
iron
man
manufacturing
mechanic
mechanical
metallic
motion
movement
objects
outside
oven
physics
pile
pipe
pointer
pressure
production
reel
sensor
standing
steel
strong
switch
temperature
tool
white
works