अक्षेषु नान्दीपिनद्धं कारयेत् ॥ कZ_०२.१९.१६ ॥
akṣeṣu nāndīpinaddhaṃ kārayet
ਅਕਸ/ਪਿਵਟ ਬਿੰਦੂਆਂ ਉੱਤੇ ਨਾਂਦੀ-ਬੰਧਨ (ਕਸਾਵ/ਲਾਕ) ਬਣਵਾਏ।
Because small mechanical looseness or hidden alterations at the pivot can systematically bias measurements; specifying a fastening standard reduces manipulation and wear-based drift.