From railways and automobiles to metals, coal, diamonds and cement, some of Russia's biggest industrial companies are putting employees on furlough or cutting staff as the war economy slows, domestic demand stalls and exports dry up. The efforts to reduce labor costs show the strain on Russia's economy as President Vladimir Putin and the U.S.-led NATO military alliance square off in Ukraine, Europe's deadliest conflict since World War II. Six companies in Russia's mining and transport sectors,