Investigation of hot gas flow in a dead-tank-type gas circuit breaker，New concept 145kV integrated air insulated switchgear，Numerical analysis of cold flow in gas circuit breaker considering the properties of SF6，Optimal design of gas circuit breaker for increasing the small current interruption capacity， RDDS (rate of decrease of dielectric strength)measurement for gas circuit breaker，Relation between Gas Blast Characteristics and Gas Passage Structure of the Thermal Puffer Type Gas Circuit Breaker。