英文關鍵字
assembly
concept
construction
craftsman
electric
equipment
factory
flame
gas
glove
gloves
hand
heat
helmet
hot
industrial
industry
iron
job
labor
light
male
man
manual
manufacture
manufacturing
mask
metal
occupation
people
person
pipe
pipeline
production
protection
protective
repair
safety
skill
skilled
smoke
spark
steel
technical
technology
tool
welder
welding
work
worker
workshop