HOUSTON--(BUSINESS WIRE)--Changing Technologies, Inc. (OTCBB:CHGT) has been talking with designers and printers that utilize exotic materials, introducing potential users to its revolutionary upcoming 3D printing portal and paving a solid path to potential long-term, sustainable revenues from an exciting new source. “3D printing is moving beyond tinkering and into serious production,” said CHGT CEO Marco Valenzuela. “Designers, printers and manufacturers using exotic materials are a natural mar
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