機器
abstract
accuracy
alert
background
business
circle
clock
clockwork
cog
cogwheel
concept
construction
countdown
deadline
design
editable
energy
engineering
equipment
factory
gear
graphic
hour
illustration
industrial
mechanical
mechanism
metallic
minute
modern
motion
part
power
progress
science
second
speed
steel
structure
symbol
technical
technology
time
timer
urgency
watch
wheel
work