母管制锅炉的组成是()。A、单机单炉B、一炉多机C、一机多炉D、多机多炉...
Monday, January 1, 2024
Monday, September 12, 2022
Saturday, March 16, 2024
T表示开氏温度,t表示摄氏温度,则t=450度时,T=()....
Wednesday, February 7, 2024
单元制锅炉的组成()。A、一机两炉B、一炉两机C、两炉两机D、一炉一机...
Wednesday, February 7, 2024
Friday, September 1, 2023
Monday, October 2, 2023
Thursday, September 15, 2022
二氧化碳气体保护焊时,焊丝的含碳量必须限制在()以下,其主要目的是为了()。...
Tuesday, July 18, 2023
锅炉叫水的方法主要是利用()的开关来实现。A、汽连通阀B、水连通阀C、放水阀D、汽连通阀、水连通阀和放水阀...
Friday, November 10, 2023
多级泵轴向推力平衡方法不包括()。A、叶轮对称布置B、平衡盘装置法C、平衡鼓和双向止推轴承法D、轴端泄漏法...
Friday, June 16, 2023
当大轴弯曲严重,用电动盘车不动时,不得用()强行盘车。A、搬钩子B、手C、杠子D、天车...
Tuesday, January 2, 2024
Monday, September 11, 2023
Wednesday, February 7, 2024
Saturday, May 13, 2023
焊条牌号“J507”,其中“7”表示焊条药皮类型为()。...
Thursday, September 15, 2022
Saturday, January 20, 2024
Thursday, September 15, 2022
Sunday, July 9, 2023