Vascular caliber with operating microscopeeyepiece scale of measurement, the length and distribution of blood vessels using a ruler and measurement of sub-regulation.
血管口径用手术显微镜的目镜标尺测量，血管长度和分布范围用直尺和分规测量。
2
The compound microscope consists of two convex lenses with short focal length, the objective and eyepiece lenses, fitted at opposite ends of a tube.