Feature

CRT, DRT (Fixed Roof Tank) : 储存近于大气压的液体 (Demiwater Tank, Potable Water Tank, etc)
FRT (Floating Roof Tank) : 储存挥发性强的液体 (随着液体存储量的变化,Roof开动,储存石油产品、原油)
SPT (Spherical Storage Tank) : Ball Tank