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 what is 3D printing
 
3D printing also known as  additive manufacturing is a process of making three dimensional solid objects from a digital file.
The creation of a 3D printed object is achieved using additive processes. 
In an additive process an object is created by laying down successive layers of material until the object is created.
object can be of almost any shape or geometry.
3d printing is the begining of a third industrial revolution succeeding in the production line assembly that dominated manufacturing
starting in the lat 19th century.
3D printing parts can have a good surface achieved  by polishing ,painting.
 
Xufeng add 3D printing machines to meet market demands in 2015
Tolearnce can be up to 0.1mm

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