機器
abstract
action
background
business
circle
clock
closeup
cog
cogwheel
concept
connection
construction
cooperation
creativity
design
engine
engineering
equipment
gear
industrial
industry
iron
machinery
macro
mechanical
mechanism
metal
metallic
old
painting
part
power
shape
steel
strength
teamwork
technology
teeth
tool
toothed
transmission
turning
used
wheel
work