Sunday, September 11, 2022
Sunday, September 11, 2022
Wednesday, September 14, 2022
非转移弧的温度和一般自由电弧差不多,只能用于薄板的焊接。...
Tuesday, September 13, 2022
超低碳不锈钢中的含碳量应小于()。A、0.01%B、0.02%C、0.03%D、0.04%...
Friday, May 24, 2024
金相检验是用来检查()、()及()的金相组织情况,以及确定()等...
Tuesday, September 13, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Thursday, July 27, 2023
气焊过程中,被加热的融化金属极易与周围空气的氧或火焰的氧化合成为...
Friday, September 16, 2022
Wednesday, September 14, 2022
三个试样的冲击韧度()应不低于母材平均值的下限A、平均值B、最高值C、最低值...
Wednesday, November 22, 2023
Sunday, September 11, 2022
Sunday, September 11, 2022
Friday, September 16, 2022
Friday, September 16, 2022
联箱可分为()联箱、()联箱、省煤器联箱和再热联箱等。...
Friday, September 16, 2022
下列()是电焊设备铭牌数据。A、输入电压B、额定电流C、空载电压D、额定暂载率E、电弧电压...
Sunday, March 10, 2024
Sunday, September 11, 2022
Wednesday, September 14, 2022