機器
abstract
background
brass
bronze
business
circle
clockwork
cog
cogwheel
concept
construction
design
detail
element
engine
engineering
equipment
gear
gears
gearwheel
group
idea
industrial
industry
isolated
machinery
mechanic
mechanical
mechanics
mechanism
metal
metallic
nobody
objects
part
parts
pattern
pinion
power
round
sprocket
teamwork
technical
technology
texture
vintage
wheel
wheels
white