The effects of lateral stress and loading rate on the strength and deformation of concrete under impact loading are discussed systematically 系统地探讨了侧应力和加载速率对混凝土强度、刚度和变形规律的影响。
Signs and luminous - discharge - tube installations operating from a no - load rated output voltage exceeding 1 kv but not exceeding 10 kv - general requirements 用无荷载额定值的输出电压大于1kv小于10kv的电源工作的标志灯和发光放电管装置.一般要求
Signs and luminous - discharge - tube installations operating from a no - load rated output voltage exceeding 1 kv but not exceeding 10 kv - part 1 : general requirements 无载额定输出电压大于1kv小于等于10kv的信号和辉光放电管设备.第1部分:一般要求
The results show that under the new power supply scheme , load rate of equipments , power factor of supply system and supply efficiency of system all have been greatly improved 在新供电方案下,油田电网的设备负荷率、系统功率因数、供电效率都得到很大提高。