Judging from the subject line, what is this email mainly about? The subject line shows that the writer wants to tell the recipient that she has come back to ___________ .
【单选题】如图凸模固定板,加工工艺过程正确的是( )。 A 下料→铣六面、倒角→钳工划线钻孔→镗凸模固定板孔及销孔→磨上下平面→热处理HRC28-32 B 下料→热处理HRC28-32→铣六面、倒角→镗凸模固定板孔及销孔→磨上下平面→钳工划线钻孔 C 下料→热处理HRC28-32→铣六面、倒角→钳工划线钻孔→磨上下平面→镗凸模固定板孔及销孔 D 下料→铣六面、倒角→钳工划线钻孔→磨上下平面→镗凸...