The height difference between high pier and low pier in this paper is that : keep the height of low pier unchangeable, while change the height of high pier, thus, there will appear the height difference between high pier and low pier. 本文中所涉及到的高低墩高差变化是指:低墩高度保持不变,高墩高度增加而产生的两桥墩高差上的变化。
The iterative magnetic pulses with reducing amplitudes can keep the height of the induced current density plateau in a certain level. 计算表明不断减小脉冲充磁电流峰值的反复充磁可以保持超导圆盘中的感应电流密度的平台在一确定水平。
Conclusion : Single nail-grooved tail steel plate and homemade intervertebral disc implant can promote intervertebral body fusion, avoid iliac bone graft, keep the height of intervertebral space and the stability of the fixation segment. 结论:单钉-沟槽柱翼钢板联合自行研制的椎间融合器后路手术治疗腰椎滑脱症可避免取骨区并发症、维持椎间隙高度和节段稳定、融合率高。
Wire plate keep a certain height with ground, manually through the guide wire to wire to wire feeding tube body. 焊丝盘离地保留一定高度,通过人工把焊丝穿过导丝管送到送丝机构。
The purpose is to keep the tree within height and width bounds for more economical management. 目的是使树冠保持在一定的高度和宽度的范围内,更经济地管理。