File:CRREL EM drill leaf springs and hinged friction blades.png

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Description
English: Anti-torque mechanisms on the 1960s CRREL EM drill, showing leaf springs and hinged friction blades
Date
Source Talalay, Pavel G.; Fan, Xiaopeng; Zheng, Zhichuan; Xue, Jun; Cao, Pinlu; Zhang, Nan; Wang, Rusheng; Yu, Dahui; Yu, Chengfeng; Zhang, Yunlong; Zhang, Qi; Su, Kai; Zhan, Dongdong; Zhan, Jiewei (2014). "Anti-torque systems of electromechanical cable-suspended drills and test results" (PDF). Annals of Glaciology. 55 (68): p. 208.
Author Herb Ueda

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Public domain
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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current19:13, 2 December 2017Thumbnail for version as of 19:13, 2 December 2017616 × 1,471 (984 KB)Mike Christie (talk | contribs)User created page with UploadWizard

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