Key technologies and applications of rigid-flexible coupling 3D printing robots Key technologies and applications of intelligent spray-painting robots Key technologies and applications of realistic rendering in 3D virtual scene Key technologies and applications for internet of video things Key technologies and applications of machine learning Key technologies and applications of intelligent food risk traceability Key technologies and applications on location-based pan-information map Key technologies and application of 5G network capability exposure Key technologies and applications in fishery forecasting Key technologies and applications of autonomous underwater vehicles