RESULTS AND CONCLUSION: The focus on increasing stability of pedicle screw is to increase screw withdrawalresistance.
结果与结论：增加椎弓根螺钉稳定性的重点是提高螺钉抗拔力。
2
A new pile-driven technology named air curtain dry soil withdrawal can reduce resistance of a sinking pipe by withdrawing soil from the pipe and installing air curtain on the outside of pipe.
空气幕、套管内干取土沉管灌注桩这种新的施工工艺是通过套管内取土，套管外设空气幕来减少沉管阻力。
3
In the casting process, the withdrawal straightener has to overcome the friction force from the crystallizer and resistance from the secondary cooling device.