Sunday, September 11, 2022
Tuesday, September 13, 2022
Wednesday, March 20, 2024
气孔是在焊接过程中,熔池的气泡在凝固中未能逸出而残留下来所形成的...
Tuesday, September 13, 2022
电梯是指动力驱动、利用沿刚性导轨运行的箱体或者沿固定线路运行的梯...
Sunday, September 11, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
钛材焊接时的定位焊缝允许有少量的裂纹、气孔、夹钨等缺陷。...
Saturday, April 22, 2023
06Cr19Ni10奥氏体不锈钢焊缝表面和近表面的缺陷采用磁粉探...
Sunday, September 11, 2022
焊工在进行管材向下焊试件操作技能考试时,应严格按照钟点标记固定试...
Tuesday, September 13, 2022
Sunday, September 11, 2022
自由锻的基本方法有()。A、拔长B、墩粗+冲孔C、拔长+冲孔D、拔长+墩粗+冲孔...
Friday, March 10, 2023
Sunday, September 11, 2022
由于物质发生迅速的化学反应,产生高温、高压而引起的爆炸,称为()...
Tuesday, September 13, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
Tuesday, September 13, 2022
Sunday, September 11, 2022
气电立焊时,()不是造成焊缝成形不良的原因。A、网络电压不稳B、焊接环境湿度高C、送丝不稳定D、焊丝没有烘干...
Friday, November 10, 2023