機器
abstract
accuracy
background
business
circle
closeup
component
concept
cylindrical
detail
diagonal
economic
economy
engineering
equal
equipment
factory
focus
group
hard
hardware
hole
improve
industrial
industry
infrastructure
item
lathe
machining
manufacturing
material
materials
mechanic
metal
new
object
part
piece
power
production
round
shaft
shape
shiny
steel
technology
texture
tool
turning