英文關鍵字
blade
carpentry
circle
circular
cutting
diamond
disc
disk
dolly
electric
equipment
expertise
factory
flash
goggles
grind
heavy
indoors
industrial
industry
inside
iron
job
machine
machinery
man
manual
manufacture
manufacturing
mechanic
metal
occupation
people
person
production
protective
rotating
safety
saw
skill
spark
spinning
steel
structural
technical
tool
wheel
work
worker
workshop