英文關鍵字
activity
adult
blade
bright
brightly
building
burning
business
cinder
circle
circular
construction
cut
detail
electric
energy
equipment
factory
fire
flying
gloves
grinder
hand
heat
heavy
human
indoors
industrial
industry
machinery
manual
metal
power
precision
production
professional
rotary
saw
sawing
sharp
slowmotion
sparks
steel
technology
temperature
tool
turning
worker
workwear