Explanatory notes
… or which have been washed (even with chemical substances eliminating the impurities without changing the structure of the product), … powdered, levigated, sifted, screened, concentrated by flotation, magnetic separation or other mechanical or …Legal note
… or which have been washed (even with chemical substances eliminating the impurities without changing the structure of the product), … powdered, levigated, sifted, screened, concentrated by flotation, magnetic separation or other mechanical or …