機器
accuracy
antique
business
circle
clock
clockwork
clockworks
closeup
equipment
gear
gearwheels
gold
household
image
industrial
industry
inside
instrument
machinery
macro
mechanical
mechanism
metal
metaphors
motion
movement
objects
obsolete
old
oldfashioned
part
people
progress
reliability
retro
series
shiny
small
steel
symbols
synergy
teamwork
technology
time
turning
view
watch
wheel