英文關鍵字
alarm
background
banner
black
board
bright
business
clock
countdown
design
digit
digital
diode
display
electronic
equipment
hour
icon
illustration
indicator
information
lamp
led
light
minute
modern
monitor
number
numeral
panel
red
retro
safety
second
sign
streets
symbol
text
time
timer
tolerance
toronto
trucks
vector
vintage
warning
zero