| 摘要 |
a)This installation comprises a freezing device composed of a cylindrical chamber forming a double envelope inside which turns a stirring means consisting of an Archimedean screw provided at its periphery with scraper blades, b)This installation is characterised in that, upstream of the part 25B equipped with the thread, the Archimedean screw includes a part provided with longitudinal blades and central movable devices. <IMAGE>
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