機器
3d
asterix
closeup
cogwheel
component
concept
control
copy
detail
drive
education
educational
engineering
equipment
extrusion
fragment
future
gear
gearing
homemade
industry
instrument
lathe
machinery
manufacture
manufacturing
mechanism
melting
model
modeling
numerical
part
pinion
plaster
plastic
print
printer
printing
production
prototype
reprap
science
technology
thermoplastic
tool
transmission