The ____________________ must be protected by the secondary flame to prevent the atmosphere from contaminating the metal.
Correct Answer:
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Q21: Welding rod size and _ can be
Q22: The oxygen and _ flame is the
Q23: What would happen if the secondary flame
Q24: Why would you move the welding hoses
Q25: What gas from the flame can protect
Q27: What is the minimum tensile strength of
Q28: Why should the end of the welding
Q29: By controlling the torch flame carefully it
Q30: Why would you use a back stepping
Q31: Why would you not reduce the flame
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