अरत्निरिन्द्रकीलः ॥ कZ_०२.३.२६ ॥
aratnirindrakīlaḥ
地桩/锁销(indrakīla)应为一 aratni(前臂长度单位)。
It prevents under-building (cost-cutting that weakens security/stability) and makes compliance measurable during inspection.