一个用VBNET编写的水和水蒸气性质计算类，参照国际IAPWS95标准编写，提供TS，TP，TQ，PS，PQ，PH,TH等方法的闪蒸计算，仅供测试-A calculation of water and steam properties of vbnet to prepare for classes, reference prepared by the international iapws95 standard, providing ts,tp,tq,ps,pq,ph,th flash calc