For tubular structures, such as blood vessels, the hydrogel is printed in the centre and around the outside of the ring of each cross-section before the cells are added.
在生产管状结构，例如血管时，每一层细胞涂布之间，水胶会被涂布到血管截面的内外来形成支撑。
Deviate from embankment centre line, subside light to subside along cross section direction curve take the form of basin promptly.
越偏离路堤中线，沉降越小即沿横断面方向沉降曲线呈盆状。
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