| http://www.w3.org/ns/prov#value | - (b) the tank comprising a filling and distribution head positioned at the orifice, wherein the tank is a tank according to claim 1, and in that the isolating member and the pre-regulating device are positioned in one and the same duct along which fluid flows between the inside and the outside of the tank, the filling and the emptying of the tank being performed via one and the same orifice and alo
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