Rikunarita-ORG/Wikinium huggingface dataset:
# Margravo

Heinrich la 1ma, margravo di Austria.
**Margravo** origine esis Mezepokala titulo por la militala komandero a quon atribuesis la defenso di un ek la frontierala provinci di Santa Romana imperio. Ca titulo (Germane: *Markgraf*) divenis heredala, ed adoptesis da kelka Germana feudala familii. Ol equivalas la titulo markezo, qua signifikas "guvernanto di frontierala teritorio" (*marchia* en la Latina).

La titulo "margravo" (*Markgraf*) adoptesis da guverninti di kelka princii Germana ed Austriana, exemple Margravio Brandenburg, Margravio Turingia, Margravio Stiria, edc.
# Periskopo

Military handheld periscope optical

design.

**1** - Eyepiece

**2** - Diagonal prism

**3** - Handle

**4 - 6** - Erecting lenses

**5** - Periscope tube

**7** - Field lens

**8** - Lens

**9** - Head diagonal prism

**10** - Window
**Principle of the periscope.A** - Periscope using two plane mirrors.

 **B** - Periscope using two right–angled prisms.

**1 - 2** - Plane mirrors.

**3 - 4** - Right–angled prisms.

**5 - 6** - Observer eye.

**7 - 8** - Periscope tube.

**H** - Periscope optical height.
**Principle of the lens periscope.A** - Periscope using a single lens (**L2**) to correct image.

**B** - Periscope which uses two lenses (**L2-L3**) to correct image.

**1-3** - Periscope window.

**2-4** - Field stop or reticle.

**P** - Right–angled prisms (or plane mirrors).

**L1** - Objective lens.

**L2** - for **A** - **L2 - L3** - for **B** - Image erecting lens.

**L3** - **L4** -for **A** - **L4-L5**- for **B** - Eyepiece.

**L0** - Field lens.

**y** - Distant object.

**H** - Periscope optical height.
**Periskopo** esas optiko-tubo, uzata dat-unesme da submarnavi, kom aparato qua posibligas vidar dum submerseso.

* Zeiss submarine periscope optical design.
* Submarine monocular attack periscope.