联轴器的键对键槽的配合其两侧应选用(),不允许有间隙;上部间隙应为()毫米。...
Friday, September 16, 2022
Thursday, September 22, 2022
Saturday, September 17, 2022
图纸的比例1∶5表示图纸上的尺寸是实物的(),而3∶1表示是实物的()。...
Thursday, September 22, 2022
Thursday, September 22, 2022
开口闪点是指用规定的()测定器所测得的闪点,单位为℃。...
Wednesday, September 14, 2022
Friday, September 16, 2022
Thursday, September 22, 2022
电气焊设备的安放位置和明火与油罐的距离都应大于()m。...
Thursday, September 22, 2022
填空题大气样品通常在距地面()高度处采样,以便所采样品尽量与()的空气相同。...
Wednesday, December 6, 2023
Thursday, September 22, 2022
Thursday, September 22, 2022
清洗导则规定,亚临界汽包炉当水冷壁管最高热荷区向火侧结垢量达()或运行间隔年限达()年时,就可确定进行化学清洗。...
Thursday, September 22, 2022
填空题测定()或微量成分分析的样品,必须使用()容器。...
Monday, October 10, 2022
Wednesday, April 10, 2024
Thursday, September 15, 2022
Saturday, September 17, 2022
Thursday, September 15, 2022
Wednesday, September 14, 2022
电力用油中,酸性成分的来源是什么?反映油中酸性物质含量的指标有哪些?...
Thursday, September 22, 2022