英文關鍵字
accuracy
background
business
circle
clock
clockwork
close
closeup
cog
cogwheel
concept
connection
design
detail
engine
engineering
gear
industrial
industry
machine
machinery
macro
manufacturing
mechanical
mechanism
metal
metallic
motion
movement
part
power
precise
precision
rotate
rotated
rotating
rotation
shiny
steel
teamwork
technical
technology
time
turn
turning
vintage
watch
wheel
work