英文關鍵字
agrarian
agriculture
arm
assembly
automation
automobile
automotive
background
business
car
combine
conveyor
electronics
element
energy
engine
engineering
equipment
factory
finance
flight
heavy
industrial
industry
innovations
kopter
line
machine
machinery
manufacturing
mechanical
metal
modern
plant
power
pressure
production
robot
station
steel
technology
territory
transportation
welding