the ninth category mainly includes

science, navigation, geodesy, photography, film, optics, weighing instruments, measuring tools, signals, inspection (supervision), rescue (rescue) and teaching tools and instruments;

Instruments and appliances for processing, switching, transmitting, accumulating, regulating or controlling electricity

Instruments for recording, communicating and replaying sounds and images, magnetic data carriers, recording discs,

vending machines and coin-operated starting devices and their mechanical structures, cash registers, computers and data processing devices, and fire-extinguishing devices. It also includes many subcategories, Bajie Intellectual Property.