英文關鍵字
angle
auto
blade
car
carving
circle
circular
closeup
construct
construction
cut
dangerous
diamond
disc
electric
equipment
factory
grind
grinder
hand
improvement
industrial
industry
iron
light
machine
manual
manufacturing
mechanic
metal
paper
part
piece
power
production
profile
protection
rotate
saw
sharp
speed
steel
technical
technology
tool
turning
wheel
work
worker
workshop