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ASHIZAWA TEKKO KK
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ASHIZAWA TEKKO KK
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Priority to JP156180ApriorityCriticalpatent/JPS56100613A/ja
Publication of JPS56100613ApublicationCriticalpatent/JPS56100613A/ja
Dispositif de valve automatique pour canalisations sanitaires d'evacuation d'eaux usees et installation sanitaire comprenant de telles valves automatiques
Materials of differing density, typically coal and stones, separated by upflowing water column, with stones moved to dewatering station by high pressure fluid flow near bottom of column