英文關鍵字
3d
acetylene
animation
background
black
brown
construction
crane
device
drawing
equipment
fire
flame
gas
gasburner
gastorch
gaswelding
handle
icon
illustration
industrial
industry
instrument
iron
isolated
isometric
machine
manufacturing
metal
motion
nozzle
object
picture
pipe
profession
propane
repair
sign
silhouette
simple
steel
symbol
technology
tool
torch
valve
weld
welder
welding
white