复合显微镜包括两个短焦距凸透镜，即位于镜筒两端的物镜和目镜。
The compound microscope consists of two convex lenses with short focal length, the objective and eyepiece lenses, fitted at opposite ends of a tube.
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。
Vascular caliber with operating microscope eyepiece scale of measurement, the length and distribution of blood vessels using a ruler and measurement of sub-regulation.
1920年，比较目镜问世。此项技术使得可以同时观察到来自两台显微镜的样品。
In 1920, the comparison eyepiece is introduced, which allows simultaneous observation of two specimens under two microscopes.
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