Which zone is the hottest and efficient burning zone of the flame used for casting ?
(A) Oxidizing zone
(B) Reducing zone
(C) Combustion zone
(D) None of the above
Which zone is the hottest and efficient burning zone of the flame used for casting ?
(A) Oxidizing zone
(B) Reducing zone
(C) Combustion zone
(D) None of the above
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