Saturday, September 17, 2022
Sunday, September 11, 2022
Monday, September 12, 2022
Sunday, September 11, 2022
Monday, September 12, 2022
问题:氧化铁皮厚而致密,酸洗前破鳞不充分,酸洗液的浓度低或温度低,酸洗...
Friday, September 16, 2022
问题:电压的单位是伏特,电流的单位是安培,电阻的单位是()。...
Friday, September 16, 2022
问题:钢材中圆钢、方钢、扁钢、等边角钢等属于()断面型钢。...
Friday, September 16, 2022
问题:型钢表面成片或成块的凹凸不平的粗糙面,此缺陷称为()...
Sunday, September 11, 2022
问题:已知Ø25带肋钢筋的理论单重为3.85Kg/m,一...
Sunday, September 11, 2022
问题:轧机上常用的轧辊轴承有滑动轴承、()和液膜轴承。...
Friday, August 25, 2023
Monday, September 12, 2022
Friday, September 16, 2022
Monday, September 12, 2022
Friday, September 16, 2022
Saturday, September 17, 2022
问题:浇铸前()充分,浇铸时液面平静没有沸腾的钢叫镇静钢。...
Saturday, September 9, 2023
Friday, September 16, 2022
Monday, September 12, 2022
Monday, September 12, 2022