英文關鍵字
action
arc
connect
construction
craftsman
dangerous
dark
dirty
electric
electrode
engineering
fire
firing
flash
floor
glove
hands
heating
hot
indoor
industrial
industry
iron
jeans
job
legs
man
metal
metalwork
motion
move
person
pipe
repair
room
safety
site
skill
smoke
spark
steel
structure
system
technical
technology
tool
tube
weld
welder
work