英文關鍵字
circle
circular
construction
cut
disc
equipment
factory
flash
grinder
industrial
industry
iron
light
machine
manual
manufacturing
metal
power
production
protection
safety
saw
spark
steel
technology
tool
wheel
work
worker
workshop
英文關鍵字
circle
circular
construction
cut
disc
equipment
factory
flash
grinder
industrial
industry
iron
light
machine
manual
manufacturing
metal
power
production
protection
safety
saw
spark
steel
technology
tool
wheel
work
worker
workshop