One day Mr. Pandey, operator at a chemical plant, was overseeing the raw material unloading from the truck to the storage tank. The pump for unloading this thick raw material was a positive displaceme…
One day Mr. Pandey, operator at a chemical plant, was overseeing the raw material unloading from the truck to the storage tank. The pump for unloading this thick raw material was a positive displaceme…