Elimination of brittleness resulting from welding of saw blades is don

1.	Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.
A.	annealing
B.	toughening
C.	work hardening
D.	tempering
Answer» B. toughening

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Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

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