The reason that caused the common air leakage defect of the aluminum alloy wheel hub with web spokes in production was analyzed using CAE technology, and the improvement scheme of the mold for wheel hub gravity casting was proposed.

This paper introduces the course of fault discovery and handling for air leakage of extinguishing arc chamber in VD4 type circuit breaker, and analyzes the reasons of air leakage, and puts forward the countenneasures that should be adopted.

A remedy case about leakage of B concentrate liquid inhale hall Which causing a error BLD alarm of the Bellco formula? haemodialysis machine;

This paper is involved in the christmas tree's leakage and the cause of leakage.

The influence of sand and dust particles on piston ring dynamics and blow-by was studied by taking into account the piston secondary motion.

On the basis of simulation and analysis about ring axial movement and gas flowthrough the piston -cylinder -ring crevice, the infiuence of operation conditions and structure ofpiston and ring on the blow-by is analysed.

However,it also has disadvantage of high requirement for sealing technique,owing to its numerons joint places if the requirement is not met,gas leakage would probably occur and the safe operation of GIS would be influenced heavily.

This paper introduces the nature of LPG,elaborates the working principle,maintenance and fault resolution of the gas leakage warning device on lpg vehicles,proposes the test way aiming at the hidden troubles of gas leakage.