英文關鍵字
adult
connecting
connection
construction
contractor
craft
craftsperson
electric
engineering
equipment
factory
fire
flame
flash
gas
gloves
hand
helmet
horizontal
industry
instrument
iron
job
labor
maintenance
making
man
manual
manufacture
manufacturing
mechanic
merchandise
metal
metalwork
person
professional
protection
repairing
rod
safety
shield
shielding
skill
sparks
steel
technical
techniques
technology
welder
welding
work
worker
workshop