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Publication of BE438961ApublicationCriticalpatent/BE438961A/xx
C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
C03C1/04—Opacifiers, e.g. fluorides or phosphates; Pigments
E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
E02B3/129—Polyhedrons, tetrapods or similar bodies, whether or not threaded on strings