Tri Steel Manufacturing Inc. Po Box 14716 Grand Forks, ND 58208 Phone : (701) 772-5591 Business Category Custom Designed Machinery Toll-Free           (800) 279-2689 Fax           (701) 772-8147 Tri-steel Manufacturing Co 3001 N Washington St Grand Forks, ND 58203 Phone : (701) 772-5591 Tri-steel Manufacturing Co Business Category Welding Machine Shops Bearings Industrial Supplies Steel Products Farm machinery & equipment Potato Harvesting Equipment Industrial & Commercial Machinery & Equipment Services           Steel Products           Parts