Photo by Jeff Rubenstone for ENR A weakness in global mining has hurt Cat's equipment sales. Construction equipment makers Caterpillar and Terex reported mixed earnings results in the second quarter, with slow global construction sales expected to continue through the second half of 2013. Caterpillar's most profitable segment was its power-systems business, but that was overshadowed by slow sales in its global mining and construction units. Cat's 2013 sales and revenue outlook is now in the range of $56 billion to $58 billion, a decline from an earlier outlook of $57 billion to $61 billion.Terex reported a 5.1% drop in
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