A.高頻感應(yīng)加熱B.中頻感應(yīng)加熱C.超頻感應(yīng)加熱
A.WP≤0.045%,WS≤0.055%B.WP≤0.040%,WS≤0.040%C.WP≤0.025%,WS≤0.020%
A.0.28~3.50%B.0.28~3.30%C.0.25~3.30%