Pset_PipeFittingPHistory Pipe fitting performance history common attributes. IfcPipeFitting IfcPipeFitting LossCoefficient Dimensionless loss coefficient used for calculating fluid resistance representing the ratio of total pressure loss to velocity pressure at a referenced cross-section. Loss Coefficient 損失係数 無次元数的な損失係数で、ある断面において、動圧に対する全圧損失の割合を表す流れ抵抗を計算するのに使われる。 FlowrateLeakage Leakage flowrate versus pressure difference. Flowrate Leakage 漏洩流量 漏洩量と圧力差の関係