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Date: 2014-07-18 14:24:48Electrical engineering Energy Electrical components Wire Distribution board Circuit breaker Coal mining Mine Safety and Health Administration Electrical connector Electrical wiring Electric power distribution Electromagnetism | MSHA - Fedreg. Doc[removed]Petitions for Modification[removed]Add to Reading ListSource URL: www.msha.govDownload Document from Source WebsiteFile Size: 71,33 KBShare Document on Facebook |