Thursday, September 22, 2022
Saturday, September 17, 2022
问题:手工堆焊工艺与手工电弧焊工艺主要的区别在于()。...
Thursday, September 22, 2022
问题:乙炔瓶瓶内的填料要求多孔且轻质,以前多用活性炭、()等合制而成。...
Saturday, September 17, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:氧-乙炔焰的堆焊工艺与气焊工艺不用的是对火焰能率的选择。...
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 15, 2022
问题:在进行带压不置换焊补时,工作地点周围空间滞留的可燃物含量必须小于该可燃物()。...
Thursday, September 22, 2022
Saturday, September 17, 2022
问题:超声波焊可焊多层薄片,且可在片与片之间再插人一片所需的材料,以便改善难焊金属的焊接性。...
Sunday, September 18, 2022
问题:金属的气割过程实质是铁在纯氧中的()过程,而不是()过程。...
Saturday, September 17, 2022
问题:特殊环境焊割作业,是指作业现场比通常情况下具有较大的危险性,在这种环境下进行焊割作业,更容易发生火灾、爆炸、触电、中毒、...
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:当其他条件相同时,稳弧性较差的焊剂焊缝厚度较大、而焊缝宽度()。...
Tuesday, September 20, 2022
问题:燃料容器在彻底置换后已经很安全,所以就没必要再对容器进行清洗了。...
Saturday, September 17, 2022
Thursday, September 15, 2022
问题:程序控制装置超声波点焊可分为四个阶段,即(),这几个阶段必须由程序控制装置来完成。...
Thursday, September 22, 2022