Thursday, September 15, 2022
Friday, September 16, 2022
问题:焊接变形按变形的特点可分为局部变形和()变形两大类。...
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:按照钢中有害元素硫和磷的含量,可将碳素钢分为()钢、优质钢和高级...
Friday, September 16, 2022
Friday, September 16, 2022
Saturday, September 17, 2022
Friday, September 16, 2022
问题:国际焊接协会认为,()是评定焊接接头层状撕裂敏感性的最好方法。...
Thursday, September 15, 2022
Sunday, September 11, 2022
Thursday, September 15, 2022
问题:根据GB5185标准规定手工电弧焊的代号是()。...
Sunday, September 11, 2022
问题:焊缝尺寸符号是表示()和焊缝各特征尺寸的符号。A、间隙B、坡口面C、钝边D、坡口...
Thursday, December 22, 2022
问题:气割厚14至20mm的钢板时,可选用G01-30型割炬。...
Thursday, September 15, 2022
Thursday, September 15, 2022
Sunday, September 11, 2022
问题:低合金强度钢的特点是()。A、强度高,塑性差B、强度低,塑性和韧性好C、强度高,塑性和韧性好D、强度低,塑性和韧性差...
Wednesday, October 12, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022