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Mathematical Problems in Engineering
Volume 2018, Article ID 2161937, 9 pages
Research Article

An Energy Efficient Two-Stage Supply Pressure Hydraulic System for the Downhole Traction Robot

College of Mechatronic Engineering and Automation, National University of Defense Technology, Changsha 410073, China

Correspondence should be addressed to Jianzhong Shang; moc.361@tdun_gnahs_zj

Received 12 December 2017; Revised 3 May 2018; Accepted 20 May 2018; Published 11 June 2018

Academic Editor: Anna M. Gil-Lafuente

Copyright © 2018 Delei Fang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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