機器
background
circle
circular
construction
cooling
cut
cutter
diamond
disc
disk
engineering
equipment
factory
fire
grinder
grinding
grindstone
hand
hole
industrial
industry
iron
job
light
machinery
machining
man
manual
manufacture
manufacturing
metal
metalworking
mill
milling
people
power
production
protection
safety
saw
spark
steel
structure
technology
welder
welding
wheel
worker
workshop