开挖过程中桩顶出现沿隧道推进方向的往复位移；
During tunneling, there are back and forth displacements at pile top along the direction in which the tunnel is pushed forward.
而合适的复位弹簧刚度可以在不显著减小隔震效果的情况下有效地控制滑移位移。
The sliding displacement can be controlled by the right stiffness of spring under the circumstance that the effect of isolation doesn't decrease too much.
目的：评价SPIR(用于化学位移脂肪抑制的频谱预饱和反转复位技术)与造影增强联合应用在眼眶病变判断中的作用。
Purpose: To evaluate the role of SPIR (a chemical shift fat suppression technique) in the evaluation of orbital lesions, especially when used in conjunction with contrast enhancement.
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