機器
aluminum alloy
bit
blue
box
cetner
cnc
cog
cutting
detail
engine
engineering
equipment
gear
gearbox
gearing
heavy
industrial
industrial background
industry
inside
machine building
machinery
manufacturing
mechanical engineering
mechanism
metal
pinion
precision
process
production
rolling
rotation
round hole
service
shaft
side
spare
stainless
steel
steel part
technical repair
technology
teeth
thread
tool
transmission
used
work
worn