The present invention relates to a discharger for discharging a predetermined quantity of fluid and a discharge system which includes the spillway.The spillway comprises a housing which defines a first longitudinal axis and which is equipped with a proximal end and a distal end.A section of the discharge has a discharge passage for the fluid that extends between an opening of entry and an outlet section of the discharge.A car that cooperates with the region of the proximal end of the housing so that the car will become mobile with respect to the housing along the first axis.The car comprising a receiving area for the fluid, and a spike with a flow channel for the establishment of a connection of flow to the fluid from the space of receBimento for opening the entrance section of discharge, the spike defining a second longitudinal axis lying in the center and provided with a surface of the casing.And the surface of casing from the spike has a curved configuration essentially convex, in particular in dome shape.The discharge system includes a container which contains a quantity of fluid and which is adapted to be loaded into the receiving space of the car.
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