英文關鍵字
arm
auto
automated
automatic
automobile
computer
construction
control
conveyor
device
electrode
engineering
equipment
factory
futuristic
handle
heavy
high
holder
industrial
industry
iron
line
machine
machinery
manufacture
manufacturing
mechanical
metal
modern
movement
nobody
operating
plant
precision
production
robot
robotic
sparks
steel
technology
thermal
tig
tool
transportation
voltage
welder
welding
working