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. 2020 Jun 30;11(7):658. doi: 10.3390/mi11070658

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Schematic diagram of the various powder-based 3D-printing processes. (a) Powder bed binder jetting (PBBJ): jetting of chemical binder; (b) multi jet fusion (MJF): jetting of fusing and detailing agent. Infrared heat absorbing polymer fusion method; (c) selective laser sintering (SLS): laser powered sintering method; (d) selective laser melting (SLM): laser powered localized material melting method, (e) electron beam melting (EBM): electron beam powered localized metal melting method; (f) powder directed energy deposition (PDED) or direct laser metal deposition (DLMD): laser powered injected-material melting method.