機器
abrasive
accuracy
blade
circle
circular
construction
control
corundum
detail
diamond
disc
disk
engineering
equipment
factory
grinder
grinding
hand
heavy
industrial
industry
iron
machinery
machining
man
manual
manufacture
manufacturing
metal
metalwork
metalworking
plant
polishing
power
production
sharpen
sharpener
sharpening
spark
sparks
steel
stone
technology
tool
welding
wheel
work
worker
workshop