英文關鍵字
meter
smart
amount
charge
consumption
control
eco
economy
efficiency
kettle
boiling
modern
monitoring
power
rate
residential
screen
coffee
electricity
energy
cost
crisis
current
device
digital
domestic
expenditure
fuel
gas
green
grid
home
hour
house
kilowatt
kwh
lcd
measurement
smartmeter
technology
voltage
watt