चतुरङ्गुलो धनुर्ग्रहः ॥ कZ_०२.२०.०८ ॥
caturaṅgulo dhanurgrahaḥ
ধনুগ্রহ (ধনুকের ধরন) চার অঙ্গুল পরিমাপের।
It standardizes production and inspection, reduces failure risk in combat, and enables predictable procurement and inventory control.