द्विवितस्तिररत्निः प्राजापत्यो हस्तः ॥ कZ_०२.२०.१२ ॥
dvivitastiraratniḥ prājāpatyo hastaḥ
Dos vitastis forman un aratni; este es el prājāpatya hasta (la medida estándar de «codo/mano»).
It enables predictable scaling from small to large measurements, preventing manipulation in bills of quantity and labor/output reporting.