- Home Stresstech Mactech Rental Product List Product Specs On Site Services Worldwide Locations Contact Tech Group Advanced Cutting.com Tech Group, Inc. is composed of two operating companies, Stresstech and Mactech, and is located in Red Wing, MN at 1007 Tile Drive. Stresstech was founded in 1974 to produce, provide and distribute portable stress relieving solutions to process industries.www.techgroupusa.com
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