Saturday, March 16, 2024
Monday, October 9, 2023
Thursday, April 18, 2024
Sunday, February 18, 2024
Sunday, January 29, 2023
Tuesday, February 13, 2024
问题:承德建龙生产的所有钢种中,质量要求最严、检验项目最多的是哪个钢种?
Saturday, August 19, 2023
Thursday, April 18, 2024
Thursday, April 18, 2024
问题:拉力、冲击试验若有一项不合格,复验时只复验不合格的项目还是两项同时复验?若
Tuesday, September 13, 2022
Monday, July 31, 2023
Saturday, July 8, 2023
问题:钢的奥氏体等温转变时,高温、中温和低温转变组织各是什么?
Saturday, March 16, 2024
Saturday, August 19, 2023
Wednesday, January 10, 2024
Tuesday, September 13, 2022
Sunday, February 18, 2024
Sunday, February 18, 2024
Thursday, April 18, 2024
Sunday, September 11, 2022