機器
background
closeup
cog
cogs
concept
connected
cutting
design
dimension
drawing
engine
engineering
equipment
factory
gear
gearing
gears
hardening
hobbing
industrial
industry
machinery
mechanical
mechanics
mechanism
metal
metallic
new
object
objects
part
parts
plant
power
precision
process
production
shiny
steel
technology
teeth
tooling
transmission
white
work