A structural sheet iron, usually galvanized, shaped in parallel furrows and ridges for rigidity.
一种结构用条状铁，通常是镀了锌的，为防止变形而具有平行的槽和边。
They then roll up the sheet and allow the cells to produce an interpenetrating mixture of structural support proteins, known as collagen and elastin.
之后将切片卷起促使细胞产生一种由结构支撑蛋白组成的混合物，即胶原及弹性蛋白。 纤维原细胞的问题在于它们会转化为平滑的肌肉细胞，最终将血管堵塞。
The buildings have a structural frame made of galvanized steel and are clad in corrugated sheet metal painted black.
建筑采用了镀锌钢制成的结构框架，并且框架都包裹上了黑色波纹金属板。
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