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. 2015 Dec 16;5:18294. doi: 10.1038/srep18294

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1-End cap, 2-Coil, 3-GMM Rod, 4-Shell, 5-Transmission bar, 6-Lever with hinge, 7-Adjusting nut, 8-Spring preload adjusting block, 9-Spring, 10-Needle, 11-Nut, 12-Nozzle, and 13-Syringe.