英文關鍵字
abrasive
action
activity
angle
blade
builder
cement
circular
concrete
construction
craft
cut
cutoff
cutter
cutting
disc
disk
dust
electric
engineering
equipment
factory
granite
grinder
grinding
hands
hardhat
improvement
industrial
industry
instrument
job
machine
machinery
man
manual
material
motion
nobody
outdoors
power
protective
saw
site
slab
spin
stone
tool
work
worker