英文關鍵字
abrasive
action
activity
angle
blade
block
building
cement
circular
concrete
construction
cut
cutter
cutting
diamond
disc
disccutter
disk
dust
dusty
electric
equipment
finishing
granite
grinder
grinding
hardhat
industrial
industry
instrument
laborer
machine
machinery
manual
material
motion
nobody
power
protective
rotate
saw
sawdust
sawing
slab
stone
tool
wheel
work
worker
workshop