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39
Speaking
19 Use the information in the table as a plan and speak about the
achievement you have read about to the class.
Revision
Name:
Ø a method to protect welds from the effects of oxygen and nitrogen in
the atmosphere
Ø the inventions in welding attributed to Russian scientists
Ø the code providing safety for construction of pressure-related items
Ø some recently developed types of welding
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