高碳钢中加入的铬元素抑制先共析铁素体析出，减小珠光体片层间距，可明显提高抗拉强度，提高断面收缩率，改善线材的拉拔性能。
By cr microalloying, the fore eutectoid ferrite eduction is restrained, the distance between rows of pearlite is decreased, then the tensile strength, section shrinkage and drawing property of high...
第二种交叉梁是所有横梁断面惯性矩相同、间矩相等而纵梁的断面惯性矩、间距则是任意的。
In the second case, all the transversal beams are arranged inequidistance and have the same stiffness, while the longitudinal beams arearraseed in arbitrary distances and have different stiffness.
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