चतुरङ्गुलो धनुर्ग्रहः ॥ कZ_०२.२०.०८ ॥
caturaṅgulo dhanurgrahaḥ
தனுர்கிரகம் (வில் பிடி) நான்கு அங்குல அளவு.
It standardizes production and inspection, reduces failure risk in combat, and enables predictable procurement and inventory control.