英文關鍵字
bright
conducting
construction
danger
energy
engineering
equipment
factory
flame
flash
helmet
hot
industrial
industry
iron
job
light
man
manual
manufacture
manufacturing
mask
metal
metallic
metalwork
metalworking
plant
process
protection
protective
repair
safety
skill
skilled
smoke
spark
sparkle
sparks
steel
suit
technical
technology
tool
welder
welding
work
worker
working
workplace
workshop