He cuts the tube, She assembles a metal structure, I weld the the piping, They install the oxigen, He bends the tube, I trace with the quare, She delivers the electrode, The assistant polishes the fail, She digns the rod, applied current at 180 turns, She joind the metals with welding , He heats the material to be oble to weld them, He ingeer inspects the weld bead, your handle the cuting machine, Julian it protects himself with goggles,

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