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S.E.I. LLC. d/b/a Helius Machining offers machining, plasma cutting and laser engraving & marking in West Allis, WI, serving aerospace, defense and energy.
“Helius Machining is a veteran-owned, family-operated job shop located in Milwaukee, WI. With over 30 years of experience, the company specializes in CNC production machining and offers services such…”
West Allis, WI
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