英文關鍵字
angle
blade
circle
circular
construction
craft
cut
danger
disk
electric
electrical
engineering
equipment
factory
flame
flash
glove
grind
grinder
hand
heat
hot
industrial
industry
instrument
iron
job
light
machine
man
manual
manufacture
manufacturing
mask
metal
power
production
protection
safety
saw
spark
steel
technical
technology
tool
welding
wheel
work
worker
workshop