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C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F1/00—Treatment of water, waste water, or sewage
C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
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FR669647D1928-02-161929-02-14Procédé pour empêcher l'adhérence des concrétions pierreuses et des cristaux sur les parois métalliques
ExpiredFR669647A
(fr)