Accordingly , a series improvement measures , such as replacing bolts with double - screw bolts , filling the gap between the double screw bolts and the torque divider with fluid sealant , etc . , are proposed 并由此提出了將螺栓改為螺柱、在螺柱的光桿部分采用密封膠填充、提高螺柱材料強度等一系列措施。