英文關鍵字
closeup
construction
equipment
factory
industrial
industry
iron
job
labor
light
man
manual
manufacturing
mask
metal
metalwork
person
protection
protective
repair
safety
skill
spark
steel
tool
welder
welding
work
worker
workplace
英文關鍵字
closeup
construction
equipment
factory
industrial
industry
iron
job
labor
light
man
manual
manufacturing
mask
metal
metalwork
person
protection
protective
repair
safety
skill
spark
steel
tool
welder
welding
work
worker
workplace