# Face- and Body-Diagonal Length Tests using a Double Ball-Bar for Squareness Errors of Machine Tools

> Research article (International Journal of Precision Engineering and Manufacturing, 2018) · cited 12× · AI/ML

**Wikidata**: [openalex:W2853497850](https://www.wikidata.org/wiki/openalex:W2853497850)  
**Source**: https://4ort.xyz/entity/face-and-body-diagonal-length-tests-using-a-double-ball-bar-for-squareness-errors-of-machine-tools