... Mingzhu Steel Structure Co.,Ltd. provides tower design and engineering, tower and sub-station detailing,MZGG manufactures steel ... towers, stub, anchor and grillage steel foundations, and tower bolts; tubular utility structures; wind utility structures; communication utility ... utility structures, such as bolts, nuts, washers, spacers and ring fills, step bolts, anchor bolts, U bolts, yoke plates, and ...