Class 9 scientific, navigation, geodesy, photography, film, optics, weighing, measuring, signaling, inspection, rescue and teaching equipment and instruments; processing, switching, transmission, accumulation, regulation or control Electrical instruments and appliances. In particular, it includes: instruments and equipment for laboratory scientific research; electrical instruments and equipment for navigation, such as measuring and signaling instruments and equipment; the following electrical instruments and equipment: (1) Certain electric heating tools and equipment, namely electric soldering irons and electric irons, if If it is not an electric product, it belongs to Category 8; (2) Some equipment and equipment, electric heating clothes, and cigarette lighters in cars, if it is not electric, it belongs to other categories; (3) Protractors, punch card office machinery, An entertainment device for use with a television. All computer programs and software, whether recorded or transmitted, that is, software recorded on magnetic media or downloaded from a remote computer network. In particular, it does not include: the following electric instruments and appliances: (1) Electrical appliances for cooking (food grinders and blenders, juicers, electric coffee grinders, etc.) and other equipment and appliances using electric motors in Category 7; (2) ) Electric razors, hair clippers (Class 8); (3) Electric toothbrushes and combs (Class 21); (4) Room heating or liquid heating, cooking, ventilation, etc.