Aprons are provided with holes for screw rods of jacking devices. Floors are lifted by special hoisting devices placed on heads of columns of the following tier. 提升环留有通过起重装置螺杆的孔。楼板用放置在下一节柱顶的专门起重设备提升。
Drilling holes for screw on the head of high pressure vessels 高压容器主螺栓孔加工
Drilling holes for screw on the head of high pressure vessels The key parameters and action law of the separation device of the expansion tube are initially determined by the project test. 通过方案选择试验初步确定了膨胀管分离装置的重要参数和作用规律,通过系统的研究确定了凹口螺栓式和分离板式膨胀管分离装置的关键参数。