Monday, May 15, 2023
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
Thursday, January 18, 2024
Sunday, September 11, 2022
粘结剂是怎样分类的?每类粘结剂分别举出两例并说明其用途(使用领域)。...
Tuesday, January 23, 2024
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
Friday, May 5, 2023
Tuesday, September 13, 2022
Thursday, November 30, 2023
石灰石砂中的Fe<sub>3</sub>O<sub>4</sub...
Tuesday, September 13, 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
Wednesday, June 28, 2023
()是铸件变形和裂纹的主要原因。A、凝固B、收缩C、铸造应力D、凝固和收缩...
Friday, May 5, 2023
Tuesday, January 23, 2024
Thursday, December 1, 2022
Saturday, April 13, 2024
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
Sunday, September 11, 2022
Tuesday, September 13, 2022