rubber o rings(mechanical seal,seat ring ) 1.R,RX.BX 2. ... ~40Mpa 4.304.347,316,ocr13,CS,CI,347... rubber o rings:1) Materials: different kinds of rubber and plastic, such ... ,, industrial parts, vehicle parts, motorcycle parts,electronics parts, gasket rubber, O-rings4) Processing methods: compression, injection, transfer, inserting molding, extrusion and ...