英文關鍵字
angle
blade
circle
construction
craft
cut
cutting
danger
dangerous
detail
disc
driller
drilling
electric
engineering
equipment
factory
fire
flame
flash
ginder
grinder
heat
hot
industrial
industry
iron
job
light
machine
metal
polish
power
production
protection
rod
safety
sharpen
sharpening
slomo
spark
speed
steel
tool
welding
wheel
work
worker