... :2002 3.4BT 3.9,6BTA 5.9,CS119L Auto parts(piston ring) for Cummins 4BT 3.9,6BTA 5.9,CS119L 1 ... piston rings from Genmany,and has introduced 30sets of ket equipments for producing piston rings and inspections instruments from Germany,Japan,USA ... ,the company engages in design,manufacture,inspection and examination of various piston rings for internal combustion engines.These are the barrel surface ...