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. 2020 Jun 1;11(6):567. doi: 10.3390/mi11060567

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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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(A) Schematic illustration of the 3D-printed, hard–soft micropump that was powered by a finger. It consists of one hard SLA-printed pump body, two metal balls and one flexible TPU blister. (B) 3D printing of the flexible TPU blister on the hard SLA-printed pump body which was pre-filled with two metal balls before FDM 3D printing.