英文關鍵字
automation
background
blue
board
chain
circulation
cutting
drive
electric
electronic
engine
engineering
enterprise
fast
filter
gear
huge
industrial
industry
instrument
iron
machine
machineparts
machinery
machinetool
machining
mechanical
mechanism
metal
metallic
metalworks
old
panels
plant
powertool
precision
process
production
retro
rotation
sharp
slide
slow
steel
strength
system
technical
technology
toning
work