| http://www.w3.org/ns/prov#value | - HOUSTON (AP) ??? National Oilwell Varco Inc. said Tuesday that net income fell 12 percent in the second quarter on higher costs, but acquisitions and strong demand for capital equipment boosted its revenue.National Oilwell Varco makes equipment for production of oil and natural gas, and in February it paid $2.5 billion to buy Robbins & Myers, which makes pumps and other equipment to control the fl
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