Sunday, September 7, 2008
كتابچه هاي مفيد در رابطه با ايمني در برق
http://www.4shared.com/file/61541965/5f2b8d6/safe_use_of_electricity.html
http://www.4shared.com/file/61542263/f2715dec/esb_networks_farm_safely_booklet.html
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