SEDIFLOTOR
LIQUID TREATING APPARATUS AND EQUIPMENT-NAMELY, MACHINES FOR CLARIFYING TURBID LIQUIDS FOR THE REMOVAL OF SUSPENDED, DISSOLVED AND COLLOIDAL SUBSTANCES FROM WATER, SEWAGE, AQUEOUS WASTES, AND LIQUIDS IN GENERAL, AND FOR CHEMICALLY TREATING SEWAGE AND AQUEOUS WASTES
Expired · June 28, 1954 · 71669000 ·