Pick out the wrong statement ?

A. ding

B. te thickness to be welded)

C. Mild steel sheet cannot be spot welded

D. Seam welding, projection welding & spot welding are the classification of electrical resistance

E. Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t =

F. In spot welding, two pieces to be joined are overlapped and placed between two electrodes

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