It is the quantitative pump which simplifies, this pump has, the all over section section (11) the substance which it possesses (1), the first expedient which is installed in the head of the bottle, the inhalation valve (9), both all over section (11) the second surface which the sending liquid chamber (17) is demarcated together (13) the elastomer head section which it has (5), the seat (45) and the emission valve which possesses the portable component which moves with first closing position and second open position (43). Extending from the head section (5), the partition (45) it forms the portable component, has become with the head section (5) and one body. The first and second surface (11 and 13) between there is a mobility suitably, the sending liquid the liquid it is possible to do. The portable component is a first position, inside the sending liquid chamber the case of decompression, that decompression the seat (45) becomes the power which is pushed to the transport component.
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