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[Audio] In this unit, we will discuss heating and welding. We will start by exploring the science behind welding and its various types, including oxy-fuel welding, stick welding, and TIG welding. We'll then move on to discuss the various heating methods used in the welding process, including induction heating, gas heating, electric arc heating, and others. Finally, we'll talk about safety considerations when engaging in welding and heating operations..