英文關鍵字
automatical
bronze
business
cable
coil
color
component
conductor
conveyor
copper
electric
electrical
electrician
electricity
electromagnetism
energy
engine
equipment
factory
hardware
heavy
inductor
industry
machine
machinery
manufacturing
metal
metallic
orange
plant
power
process
production
reactive
roll
spool
steel
supply
transformer
voltage
wheel
winding
wire
wiring
work