… in the form of paper, wadding, felt, nonwovens, cellular plastics or cellular rubber, impregnated, coated or covered …
Explanatory notes
… in the form of paper, wadding, felt, nonwovens, cellular plastics or cellular rubber, impregnated, coated or covered … these powders with, for example, a solution of waxes in a lubricating mineral oil. These preparations, which are often put up for retail sale and are usually in …