Sunday, September 11, 2022
Thursday, April 11, 2024
Tuesday, September 17, 2024
问题:离心泵所输送的液体的粘度增大,则最高效率点处的流量,压头与效率都变小。
Wednesday, May 15, 2024
Friday, January 5, 2024
Monday, October 24, 2022
Monday, September 11, 2023
Friday, September 22, 2023
问题:压力变化时,液体的粘度()。A、增加B、不变C、减少D、基本无变化
Wednesday, March 13, 2024
问题:当介质压力超过规定值时,阀瓣自动开放,等排放到低于规定值时自动关闭,对管道或设备起保护作用的阀门叫做()。
Saturday, March 4, 2023
Friday, September 22, 2023
Monday, November 18, 2024
Thursday, April 11, 2024
Monday, April 15, 2024
Thursday, November 7, 2024
Wednesday, October 9, 2024
问题:在寒冷冬季,尤其在室外的泵,在停车后应立即放掉泵内的液体,以防结冰冻裂泵体。
Thursday, November 7, 2024
Saturday, July 8, 2023
Sunday, September 11, 2022
Thursday, July 6, 2023