英文關鍵字
abstract
assembly
background
bobbin
brass
cable
circuit
closeup
coil
component
construction
copper
electric
electrical
electrician
electricity
energy
engineering
equipment
factory
hardware
heavy
high
indoor
indoors
industrial
industry
interior
line
machine
macro
manufacturing
metal
plant
power
production
reel
rod
spool
steel
stranded
tool
using
welding
wheel
wire
wires
work