# Holweck pump

> A type of vacuum pump that utilities the drag of air molecules against a rotating surface.

**Wikidata**: [Q4300366](https://www.wikidata.org/wiki/Q4300366)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Molecular_drag_pump)  
**Source**: https://4ort.xyz/entity/holweck-pump