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(A) Schematic diagram of the PμSL 3D printing process for fabricating multi-layer microfluidic chips. (B) Photograph of the 5 × 3 3D printed microfluidic chip array. (C) Photograph of the microfluidic chip connected with tubes. (D) The internal structure of the microfluidic chip. (E) Micrograph cross-sectional image showing the three-layer layout of the microchannels. (F) Micrograph image of the top view microchannel.
