英文關鍵字
circular
construction
cutter
cutting
definition
electric
engineering
equipment
factory
flame
format
glove
grinder
hand
high
human
industry
iron
machinery
male
man
manual
manufacturing
mechanic
men
metal
metalwork
occupation
one
people
person
place
power
protective
repairing
repairman
saw
sparks
speed
steel
technology
temperature
tool
video
welder
work
worker
working
workshop
workwear