As the upper stone rotated on the lower stone, kernels of grain were fed between the two and were pulverized.
जब ऊपरी पत्थर, नीचे के पत्थर को रगड़ते हुए घूमता तो दोनों पत्थरों के बीच अनाज के दाने गिरकर पिसने लगते थे ।