Effect of shielding gas on the weld pool phenomena at the 4.1 of gas in the gas shielding effect of shielding gas on temperature measurement of molten pool in the vicinity of the hotel's Chapter 5 in elemental analysis of near field 4.3 look at its 4.2 bead weld pool in welding. 5.1 flow at the observation study of zinc vapor 5.2 too. Chapter 6 at all at the seventh chapter summary
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