機器
automatic
background
bobbin
brass
circle
coil
connection
copper
current
curve
danger
electricity
energy
engineering
equipment
factory
filament
hardware
heavy
industrial
manufacturing
material
metallic
power
pressure
production
protection
reel
repair
roll
round
safety
security
shiny
slim
spiral
spool
steel
strength
structure
technology
thin
tool
voltage
welding
winding
wire
work
workshop