... /ODM are welcomed EPDM O Ring/NBR O Ring1 EPDM O ring 2 Material: NBR,HNBR,PTEE ... mold center, can develop most kinds O ring of high tech requireds.7 Experience in export business ... are include rubber widescreen,elbow,oil seal,o-ring andso on.8 According to customers' drawing ... ,customized specifications are welcomed.9 All administration of manufaturing are undercontroled by Railway Ministry10 Designing ...