... , fast dynamic response, and high reli JF180 (Series) Drum Rolling TesterStandards:GB 18352.2-2001GB /T12536-1990GB /T12537-1990GB /T12543 ... electric-simulate technology, freely set the tested inertia, step-less continuous change, wide simulation range and high precision.(3) Power- ... aim at middle.(7) Center distance of multi-axis drum rolling is continuous and adjust-able, aims at the second and third ...