1. 'J' anti-dust sealing ring product CodeJF.J
　　Technical characteristic: Can long-term exposure in the air, the working environment with a lot of dust. Has good resistance to weather, excellent wear resistance, high anti-tearing strength, small friction coefficient, has been widely applied in coal digging comprehensive mechanized equipment, with long service life.
　　Quality standard code: Northwest rubber industry product research institution standard Q/×XY-203-80 Q/XXY-204-80
　　Ministry of Chemical Industry: HG4-332-66
2. 'Y' anti-dust sealing ring product Code 'NY' (Intra-action) (WY) extra-action Y (ordinary)
　　Technical characteristic: Can bear high pressure of 100～400 kg/sq. cm for long-term. Has good physical and mechanical properties, widely applied in key parts of hydraulic system.
　　Quality standard code Ministry of Chemical IndustryHG4-335-66
　　Northwest rubber industry product research institution standard Q/XXY-203-80 Q/XXY-204-80