水玻璃中二氧化硅与氧化钠摩尔数的比值称为水玻璃的()。...
Sunday, September 11, 2022
大型铸钢件为防止粘砂,可用()作面砂。A、硅砂B、锆砂C、镁砂...
Thursday, June 22, 2023
Sunday, September 11, 2022
Tuesday, September 13, 2022
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Tuesday, October 24, 2023
Tuesday, November 21, 2023
Sunday, September 11, 2022
Wednesday, June 28, 2023
Sunday, September 11, 2022
Friday, May 5, 2023
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Friday, June 30, 2023
铸件的最小铸出壁厚为最大的是()。A、灰铸铁B、铸钢C、球墨铸铁D、铸铝...
Friday, April 26, 2024
Sunday, September 11, 2022
粘结剂可以分为无机与有机两大类,每类又可分为()两种。...
Tuesday, November 21, 2023
造型操作中,开的内浇口数量多,浇注的速度快、则充满铸型的铁水的()就小。...
Thursday, November 30, 2023
Monday, May 15, 2023
Tuesday, November 21, 2023
在ZGS98—40/100(53)中,ZGS表示()。...
Sunday, June 18, 2023