英文關鍵字
arc
background
battery
blac
burn
charger
circuit
conductor
copper
curent
current
damage
danger
direct
electric
electrical
electricity
engineering
equipment
experiment
fault
fire
flame
flash
hazard
high
huge
incandescent
industry
insulation
melting
motion
physics
power
repairs
safety
science
shock
short
shorted
slow
smoke
source
spark
sparks
supply
technology
temperature
unsafe
voltage
wire