问题:液压起货机液压油路上安装单向阀主要目的是在吊货中一旦停电,有个持...
Thursday, September 15, 2022
Sunday, September 11, 2022
问题:根据柴油机曲轴转速或活塞平均速度的快慢程度分辨柴油机的类型。...
Sunday, September 11, 2022
Thursday, September 15, 2022
问题:制冷系统中滑油分离器通曲轴箱的回油管路有的装有节流孔板,用来防止...
Thursday, September 15, 2022
问题:柴油机运转中若高压油管脉动剧烈并发热,排气温度明显下降,喷油泵泵...
Thursday, September 15, 2022
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:纯电感电路中,将瞬时功率的()称为无功功率。A、最大值B、最小值C、平均值D、有效值...
Sunday, July 2, 2023
Thursday, September 15, 2022
Thursday, September 15, 2022
Thursday, September 15, 2022
问题:十字头式柴油机连杆大端浇铸百合金时开有燕尾槽的目的是()。A、利于润滑B、增加百合金数量C、防止液击D、使百合金结合牢固...
Thursday, January 18, 2024
问题:螺杆为细长构件,刚度低,易变形,故在拆装起吊中要注意防止受力弯曲...
Sunday, September 11, 2022
Sunday, September 11, 2022
问题:组合式曲轴在中高速柴油机上得到广泛应用;整体式曲轴普遍应用于大型低速柴油机中。...
Friday, July 14, 2023
Wednesday, January 25, 2023
Sunday, September 11, 2022
问题:()是我国政府实施ISM规则认证的认可和授权机构。...
Sunday, September 11, 2022