2.Interface sealing ring: when connector is mated, the interface sealing between shells of plug and receptacle should be performed by the sealing ring in order to protect it from dust, liquid and harmful gas.
3.Wire sealing body: when all contacts are mated locking ring inside wire sealing body may lock each wire tightly to prevent external flexure to damage wire and protect it protect it from dust, liquid and harmful gas leaking radically into connector.
