3D打印, or 3D printing, is a manufacturing process that creates three-dimensional objects from digital files. It works by layering materials, such as plastic or metal, to build the object from the ground up. This technology allows for complex designs and rapid prototyping, making it popular in industries like 医疗, 汽车, and 航空. The process typically involves using a 3D打印机, which reads a digital model and deposits material layer by layer. 3D打印 can be used to produce everything from simple toys to intricate parts for 飞机 and 医疗设备. Its versatility and efficiency are transforming traditional manufacturing methods.