A.石墨電極 B.自焙電極 C.炭素電極
A.50~80℃ B.80~100℃ C.100~150℃
A.P≤0.045%,S≤0.040% B.P≤0.035%,S≤0.030% C.P≤0.030%,S≤0.020%