Saturday, October 22, 2022
Wednesday, September 14, 2022
Tuesday, September 13, 2022
Thursday, September 15, 2022
问题:采用刚性固定法会使焊缝区域产生较大的内应力,因此这种方法适用于()。A、碳钢结构B、薄板结构C、塑性较好的低碳钢...
Monday, May 8, 2023
问题:带传动中,包角越小,打滑的可能性越大,因此规定小带轮的包角为()...
Wednesday, September 14, 2022
问题:焊接的基本变形形式除纵向变形、横向变形、弯曲变形外,还有角变形、...
Thursday, September 15, 2022
问题:将金属结构件的表面或局部,按它的实际形状和大小依次摊开在一个()...
Thursday, September 15, 2022
问题:若钢板较薄时,焊缝又处于钢板中部的位置时,焊接后常发生()变形。...
Thursday, September 15, 2022
Tuesday, September 13, 2022
Tuesday, September 13, 2022
问题:增大摩擦力的防松方法多用于冲击和振动()的场合。...
Tuesday, September 13, 2022
问题:为了提高梁在其横截面内的稳定性,在设计上常采用的方法是()。A、在腹板上用肋加强B、增大腹板厚度C、增加翼板宽度...
Thursday, May 4, 2023
问题:划线工具大多使用T7、T8钢,其工作部分要经过淬火和低温回火处理...
Thursday, September 15, 2022
问题:磨砂轮机时,人站立位置与砂轮成()以防砂轮损坏时飞块伤人。A、45°角B、90°角C、180°角...
Sunday, November 19, 2023
Tuesday, September 13, 2022
问题:平面与圆锥相交,当截平面与圆锥轴线倾斜,并截圆锥所有素线时,其截...
Thursday, September 15, 2022
Thursday, September 15, 2022
Tuesday, September 13, 2022
Thursday, September 15, 2022