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。

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

youdao

广场上90度到车轮上的斜板和磨尖平，然后摆动倾斜到一边。

Place the skew on the plate at 90 deg to the wheel and grind the tip flat then swing the skew to the side.

youdao

第三、用木尖调整好框的水平垂直度。

Level third, with wooden tip verticality adjusting well frame.

youdao