120 the national standard for waterproof cloth includes the manufacturer's name, trademark, product mark, production date and batch number, production license number, and precautions for storage and transportation. 120 symbols of the national standard for waterproof cloth are mandatory on the packaging, and must be marked according to the method, sequence and code specified in the national standard. Every roll of materials must be marked, and anything that is not marked on the roll or is not fully marked is a fake. The following contents shall be indicated on the mark: the name of the manufacturer, trademark, product mark, production date and batch number, production license number, and precautions for storage and transportation.