This document specifies the terms and definitions, product structure and main parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of fused deposition 3D printers (hereinafter referred to as "printers"). This document applies to 3D printers that use engineering plastics such as ABS and PC, biodegradable materials such as PLA, polymer materials such as TPU elastomers, and their composite materials as 3D printing consumables.