英文關鍵字
abrasive
accuracy
back
buffing
building
circle
clean
cooling
crimped
crosses
day
device
disc
disk
electric
engineering
equipment
fabrication
factory
flap
forth
getting
grind
grinder
grinding
grindstone
handheld
hands
hold
industry
instrument
iron
leaning
machine
machinery
machining
man
mans
manual
manufacture
materials
metal
metallic
metalworking
one
polishing
power
precision
process
protection
reconstruction
revitalization
rid
rigid
safety
sandpaper
sawing
service
sharpener
smoothing
speed
splashing
structure
summer
surface
tapered
technology
than
tool
trainee
treatment
turning
welding
wheel
work
worker