英文關鍵字
battery
boiler
central
concept
connection
crisis
current
domestic
economy
electric
electrical
electricity
electronics
energy
expensive
hand
heat
heater
holding
home
hot
increases
interior
knob
loss
male
man
object
payment
pipe
plumbing
power
pressure
price
radiator
regulator
service
system
technology
temperature
thermal
thermostat
utility
valve
video
warmth
white