问题
名词解释
碳弧气刨
答案
参考答案:
使用石墨棒或碳棒与工件间产生的电弧将金属熔化,并用压缩空气将其吹掉,实现在金属表面上加工沟槽的方法。
碳弧气刨
参考答案:
使用石墨棒或碳棒与工件间产生的电弧将金属熔化,并用压缩空气将其吹掉,实现在金属表面上加工沟槽的方法。
选择方框内合适的词,并用其适当形式填空。 | |
2. Do you _______ newspapers every day? 3. Those _______ look very nice. Shall we get some, Mum? 4. I'm afraid I can't help you. You'll have to do it by _______. 5. Jim is not _______ in English. How can we help him? |