Sunday, March 3, 2024
问题:洛氏硬度标度用()表示。A、HRAB、HRBC、HRCD、以上都对...
Friday, March 24, 2023
问题:焊缝内的气孔最适合的无损检测方法为()。A、 RTB、 UTC、 MTD、 PT...
Sunday, January 22, 2023
问题:滤光片是高原子序数金属(如铜、钢、铅)制成,其作用是()。A、吸收X软射线,达到过滤目的B、降低工件对比度,从而增大其宽容度C、减少由软射线所引起的散射线D、以上都是...
Tuesday, September 5, 2023
Friday, September 16, 2022
Friday, September 16, 2022
Saturday, January 14, 2023
Monday, September 12, 2022
问题:将一块铅质板钻上小孔针孔,放在X射线管和胶片之间,这是常常用来作...
Friday, September 16, 2022
Friday, September 16, 2022
问题:微机自动探伤,全轴穿透检验:轴向全轴穿透,周向扫查范围须大于()。A、90°B、180°C、300°D、360°...
Sunday, February 12, 2023
Monday, September 12, 2022
问题:硬磁材料与软磁材料的区别是:硬磁材料剩磁大,软磁材料的()。...
Monday, September 12, 2022
Friday, September 16, 2022
问题:在一定的管电压下,达到相同射线吸收效果的标准材料厚度与被检材料厚...
Friday, September 16, 2022
Friday, September 16, 2022
问题:JB3963—85标准适用于大于等于50mm的压力容器用碳钢和低合金钢锻件进行的()。...
Sunday, March 12, 2023
问题:下列有关磁悬液的制作方法的叙述,是正确的是()。...
Monday, September 12, 2022
Friday, September 16, 2022
Monday, September 12, 2022