One type of welding is tube welding. Another type if mig
welding.
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SAW welding is a type of arc welding while ERW welding is spot
or seam welding. SAW stand for submerged arc welding while ERW
stands for electric resistance welding.
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smaw welding is sheilded metal arc welding
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what is the difference between ultrasonic welding &
radiographic welding