| 摘要 |
The invention relates to a device for cleaning a refractometer prism, situated in the bottom of the tank containing the sample of liquid to be measured, and for draining the said tank. This device is characterised in that the prism 2 is cleaned and the tank 1 is drained by suction of the liquid contained in the latter by means of a pipe 5 whose end is situated in the zone of the prism. <IMAGE>
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