英文關鍵字
apparatus
business
circling
closeup
conveyer
conveyor
device
document
engineering
equipment
exhibition
indoor
industry
line
machine
manufacturing
mechanism
motion
nobody
noone
paper
plotter
polygraph
polygraphinter
polygraphy
press
printer
printing
printout
publisher
publishing
roll
roller
rotation
run
several
shaft
spin
technology
turn
wheel
work