The straight-edge diffraction of this parallel beam superposing on the light spot constitutes the so-called M-line.
这束平行光的直边衍射花纹与光斑本底叠加的结果在观察屏上形成为通常所称的M线。
2
Similar results were observed in the static stretch group, but the difference of label density between the control and the static stretch in the areas beyond M-line was nonsignificant.