... ,Gate,Hydropneumatic,Electronics 3.Main products:O-Ring.X Ring V-Ring 1. material:NBR,EPDM,SI ... air conditioning, etc.3. Main products: O-Ring.X Ring V-Ring.R-Ring. Y-Ring.U-Ring ... Test, Thickness Meter, Shore-A Hardness Tester, Optical Projector.Production Equipments Rubber Preforming Machine, Rubber Injection Machine, Rubber ... , Thickness Meter, Shore-A Hardness Tester, Optical Projector rubber X seals