英文關鍵字
background
blade
circular
construction
cut
cutting
die
disc
drill
electric
electrical
engineering
equipment
factory
flash
gray
grind
grinder
hand
hard
holding
industrial
industry
iron
light
machine
man
manual
manufacture
manufacturing
mechanic
metal
power
production
protection
protective
safety
saw
spark
sparkles
speed
steel
technical
technology
tool
turning
vintage
welding
wheel
work
worker
workshop