英文關鍵字
elevator
background
modern
digital
office
electric
electronic
element
equipment
indicator
led
level
light
panel
end
diode
design
number
digit
technology
device
deadline
business
counter
countdown
change
red
screen
display
set
top
time
power
effect
textured
second
transportation
passage
concept
down
remaining
black
sign
text
lift
construction
numeral