Shandong TiGold Precision & Smart Co.,Ltd. Shandong TiGold Precision & Smart Co.,Ltd. is a group around the China and beyond, who has 4 business units in the group companies: + Railway Spring: the coil spring for the bogie of the rail train. + Gear Shaft Blank: the shaft blank for the transmission (gearbox) of the passenger car and commercial vehicle,which is rolled by the cross-wedge rolling technology. + Forged Parts: standard components and irregular parts + Machine Vision: with machine learning algorithm system automatically detecting the flaw. + Wheelchair & Mobility: power & mannual wheelchair, patient lift, floor patient transfer, easy & careful mobility.