英文關鍵字
aerospace
arc
automated
automation
background
burn
close-up
cnc
construction
cut
cutting
danger
drilling
energy
engineering
equipment
factory
fire
flame
fly
gas
heat
hot
igniting
industrial
industry
kocani
laser
light
line
macedonia
machine
machinery
machines
machining
manufacture
manufacturing
metal
metall
metallurgy
metalwork
plasma
plate
processing
science
shearing
sheet
spark
sparks
steel
technology
tool
torch
welded
work
workshop