This special cancellation mark shows CHARKHA. which is a two wheel mechanism on which thread can preparedfrom row cotton,which is finally used to prepare KHADI- A typical variety of cotton cloth.
Be like a trace still not take out, can twist a cotton cloth after the dip in Wenshui dry, inunction of on drop a few ammonia water, use glazing candle polish finally.
The filter element he and his team have designed is a mesh of tiny carbon cylinders, known as nanotubes, and silver wires laid on top of a thin strip of cotton cloth.