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
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
Sunday, September 11, 2022
Sunday, September 11, 2022
Friday, May 5, 2023
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
Friday, January 27, 2023
耐火度高的粘结剂是()。A、钙基基膨润土B、钠基膨润土C、锂基膨润土D、高岭土...
Tuesday, January 23, 2024
Friday, April 26, 2024
Sunday, August 20, 2023
采用()加固吊砂,是一种最方便的加固方法。A、铁钩B、铁钉C、箱带...
Sunday, May 7, 2023
铸件结构工艺性不良,如圆角太小,各断面壁厚差悬殊,都能产生应力集中,从而导致()。...
Wednesday, September 20, 2023
Thursday, December 15, 2022
Thursday, December 1, 2022
Sunday, September 11, 2022
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
上窑时铸件与铸件的最小间隔是()。A、10mmB、20mmC、30mmD、50mm...
Friday, April 26, 2024
Tuesday, January 23, 2024
Saturday, November 25, 2023
Sunday, September 11, 2022