who has devloped the yasti - yantra device which is used -

yasti yantra; ultrasonic distance meter; phalaka yantra; chakra yantra Out of following is not ancient astronomical instrument expand image

yasti yantra; ultrasonic distance meter; phalaka yantra; chakra yantra Out of following is not ancient astronomical instrument expand image

krishi yantra anudan Yantra Parichay E-Text · Learn More · Self Learning · Nadibalay Yantram · Yasti Sadhanam · Falak Yantram · Jalantar Vedh · Syamwah yantra Lakshnam

chetak yantra lottery result and circular instrument , a cylindrical stick yasti yantra, an umbrella-shaped device called the chatra yantra and water clocks