機器
abstract
accuracy
closeup
cogwheel
complex
cut
cutter
cutting
cylindrical
detail
engineering
equipment
factory
gear
gear hob
gear shaper
gears
hobbing cutter
industrial
industry
involute
lubricant
machinery
machining
manufacture
manufacturing
mechanical
mechanical engineering
metal
metalwork
metalworking
milling
moving
oil
part
precision
process
processing
production
quality
services
sharpening
shaving
steel
technology
tool
tools
work
workshop