英文關鍵字
220
accumulator
backup
battery
black
circuit
close
closeup
current
damage
device
display
electric
emergency
energy
equipment
excessive
hardware
incoming
industry
isolated
module
network
object
overload
plug
power
prevention
processors
protection
safety
screen
security
service
stability
standby
storage
supply
support
system
technology
transformer
uninterrupted
uninterruptible
ups
utility
values
volt
voltage