# parallel rulers

> drafting instrument used to draw parallel lines

**Wikidata**: [Q2051620](https://www.wikidata.org/wiki/Q2051620)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Parallel_rulers)  
**Source**: https://4ort.xyz/entity/parallel-rulers


## References

1. Freebase Data Dumps. 2013
2. [Palmhouten pleinschaal door Jacobus Kley, Rotterdam, 1750 - 1791. 1750](https://n2t.net/ark:/33862/collect/527960)