機器
alarm
alarm clock
alert
analog
antique
awake
awaken
bell
black
circle
classic
clock
countdown
design
front
graphic
green
hour
illustration
instrument
isolated
keeper
minute
morning
nobody
number
object
old
reminder
retro
ring
ringer
school
second
sign
simplicity
single
sleep
symbol
tick
time
timer
vintage
wake
wakeup
waking
watch
white