HOUSTON--(BUSINESS WIRE)--Changing Technologies, Inc. (OTCBB: CHGT) is examining entering the large-format 3D printing market – a move that would enable the company to expand its growing array of printing offerings and start a promising new revenue stream. Large-format 3D printing involves much bigger pieces than currently produced in most 3D printing operations. It includes items ranging from life-size mannequins all the way to pedestrian bridges and housing units, motorcycles and even jet eng
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