機器
accuracy
blue
bolt
chrome
construction
cutter
cutting
equipment
gear
hard
heavy
industrial
industry
iron
lathe
machinery
machining
macro
manufacture
manufacturing
metal
metalwork
metalworking
pinion
process
processing
production
round
shape
shiny
spiral
stainless
steel
technology
thread
threaded
tone
toning
tool
turning
work
worm
wrench