CINCINNATI (AP) â¿¿ Air pollution control and industrial ventilation systems maker CECO Environmental Corp. said Wednesday it secured $10 million in new orders with undisclosed customers. "These orders were secured by our contracting services and equipment groups in the refining, automotive, steel, chemical, mining, and power industries," said CEO Jeff Lang, in a statement. A third of the business came from international operations, including China, Taiwan, and India. Shares of CECO fell 23 cents, or 4.5 percent, to $4.94 in afternoon trading. The stock has traded between $2.63 and $5.64 over the last 52 weeks.