Objective To study the influence of excision of sacrum through the superior and inferior margins of the 1st to 3rd posterior sacral foramina on area of sacroiliac joint surface.
目的研究经第1~3骶后孔上、下缘水平切除骶骨对骶髂关节面面积的影响。
The Steel Finger type expansion joint system shall seal the deck surface, gutters and curbs in accordance with the plans and prevent water from seeping through the joint area.
钢梭型伸缩缝系统按照平面图对道路表面、路槽及路缘进行密封，防止水渗流通过缝隙区域。
The Steel Finger type expansion joint system shall seal the deck surface, gutters and curbs in accordance with the plans and prevent water from seeping through the joint area.
钢梭型伸缩缝系统按照平面图对道路表面、路槽及路缘进行密封，防止水渗流通过缝隙区域。
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