Wednesday, March 20, 2024
问题:连续精馏塔进料板以上称(),进料板以下包括进料板为()。...
Saturday, April 13, 2024
Friday, March 8, 2024
Friday, December 16, 2022
Saturday, April 13, 2024
Saturday, November 11, 2023
问题:煤气中焦油、萘、硫化氢、氰化氢对化产回收有什么害处?...
Thursday, April 18, 2024
Saturday, December 2, 2023
Thursday, April 18, 2024
问题:闸板阀的关闭件(闸板)沿阀座的中心线的垂直方向移动。...
Sunday, September 11, 2022
Saturday, November 11, 2023
问题:流体的沸点与气压有关系,气压增大,沸点升高。()...
Saturday, December 2, 2023
问题:巴氏合金轴瓦浇铸后,合金层发渣,失去弹性和塑性是因为巴氏合金浇铸过热引起的,浇铸温度范围是380-420℃。...
Sunday, May 28, 2023
Saturday, September 10, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
Monday, January 1, 2024
Friday, March 8, 2024
Saturday, November 11, 2023
问题:往复泵出口安全阀是当超压时安全阀启跳,使液体回到泵入口,达到保护管线、设备的目的。...
Monday, June 12, 2023