The effect of specimen type, thickness, dimension ratio, and notch sharpness on fracture toughness of a carbon rail steel was examined.

研究了试样类型、试样厚度、比例试样尺寸及切口尖度等因素对普碳轨钢断裂韧性的影响。

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The structure of slide rail over and under type skid bed drawing steel rail has been introduced, and the strength and rigidity of main load -bearing slide rail have been calculated.

介绍了攀钢轨梁厂钢轨收集装置——滑轨升降式拉钢台架的结构，并计算了主要受力构件滑轨的强度和刚度。

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Then the transform merit of the hold type railroad steel rail borer machine mainly embodiment lowered the Labour intensity of blacksmith, raised a working efficiency.

便携式铁路钢轨钻孔机的加工优点主要体现在降低了铁工的劳动强度，提高了工作效率。

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