NanjingRuiyingPistonRingManufacturingCo.,Ltd(former:NanjingJinlingAutoPartsManufacturingFactory)locatesinNanjingChina,specializinginproducingmanykindsofpistonringswithover50yearsexperience.Ourcompanyhasmadelarge-scaletechnologicalimprovementduringtheyears1985-1989and1991-1995,andintroducedadvancedmanufacturingtechnology,processingequipmentsandtestinginstrumentsfromGermany,Britain,theUnitedStates,Japanandothercountriessoastomakeourcompanystepintothe...... [详情]