求翻译：悬浇箱梁的普通钢筋及预应力管道除须满足一般施工工艺的要求外，要特别注意①预应力管道要严格按设计的要求布置，当与普通钢筋发生矛盾时，优先保证预应力管道的位置正确。②对预应力用的定位筋固定牢固，确保其保护层的厚度。③纵向管道的接头多，接头处理必须仔细，并要采取措施防止孔管堵塞。④由于纵向管道较长，一般要在管道中间增设若干个压浆三通，以便压浆时，可以作为排气孔或压浆孔，以保证孔道压浆密实。是什么意思？

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