如果渗碳零件用化学方法去毛刺后没有按规定洗净晾干而生锈,会导致零件淬火后出现() A 发布时间:2018-05-20 13:58 │ 来源:www.tikuol.com 题型:单项选择题 问题: 如果渗碳零件用化学方法去毛刺后没有按规定洗净晾干而生锈,会导致零件淬火后出现()A.裂纹B.硬度不足C.软点D.渗层不均匀
题型:单项选择题 -Why do you suggest we buy a new machine?-Because the old one has been damaged _____.[ ]A. beyond reach B. beyond repairC. beyond control D. beyond description 查看答案