機器
airing
aluminum
bars
carbon
carbon fibre
close
closeup
composites
construction
contrast
cross section
design
detail
effective
energy
engine
engineering
factory
helical
industrial
industry
inside
intersection
iron
light
line
mainspring
manufacture
material
mechanic
motor
motorized
orange
part
perforation
plastic
power
powerful
product
roller
rubber
screws
spring
steel
ventilation