… ( heading 70.05 ). In the unworked state this glass shows marks resulting from contact with the roller or may … which may also be coloured in the mass, is used for the windows of factories, warehouses, offices, bathrooms and, in …
… microcrystalline structure which X‑ray examination shows to be that of graphite. Chemical analysis confirms … thus obtained is not homogeneous; microscopic examination shows a mixture of grains of graphite with grains of …
