द्विरज्जुकः परिदेशः ॥ कZ_०२.२०.२२ ॥
dvirajjukaḥ parideśaḥ
A parideśa (a defined land-extent) is two rajjus.
They allow surveyors and clerks to describe parcels in standardized steps, reducing ambiguity in deeds, grants, and disputes.