Friday, May 5, 2023
Tuesday, September 13, 2022
Thursday, December 1, 2022
问题:新包砌好后应烘烤()小时以上。A、2B、3C、6D、8...
Sunday, August 20, 2023
Thursday, November 30, 2023
Sunday, September 11, 2022
问题:对型砂强度要求较高的是()用型芯砂。A、铸铁件B、铸钢件C、铸造非铁合金件D、铸铝件...
Friday, May 5, 2023
问题:刚玉砂是由()经过粉碎、洗涤后电炉内2000--2400℃高温下熔炼而成。...
Thursday, November 30, 2023
Sunday, September 11, 2022
Saturday, April 13, 2024
Tuesday, January 23, 2024
问题:计算题:某厂进入一批原砂,现拿量筒取100ml,放入天平称重为188g,求砂的堆密度是多少?...
Thursday, February 22, 2024
Tuesday, October 24, 2023
问题:水玻璃砂的组成一般是()。A、石灰石,水玻璃,氯化胺B、硅砂,水玻璃,CO2C、锆砂,膨润土,煤粉D、石英砂,煤粉,膨润土...
Sunday, August 20, 2023
问题:当铸造应力超过金属的强度极限时,铸件就产生()A、冷列B、拉长C、变形...
Friday, December 23, 2022
Sunday, September 11, 2022
问题:()是多次可以使用的铸型。A、干型B、湿型C、金属型...
Friday, June 30, 2023
Wednesday, June 28, 2023
问题:我们可通过检测型砂的()性能来粗略地判断型砂起模韧性。...
Wednesday, June 28, 2023
Saturday, November 25, 2023