機器
abrasive
abstract
background
belt
brown
carborundum
carpenter
carpentry
closeup
cloth
construction
danger
dark
detail
electric
emery
equipment
fabrics
flint
grinder
grinding
industrial
industry
isolated
machines
many
material
object
paper
pattern
polishing
power
ring
sand
sand paper
sander
sanding
sandpaper
set
sheets
sign
strip
texture
tool
white
work
workshop