C
CHEMISTRY; METALLURGY
C
CHEMISTRY; METALLURGY
C03
GLASS; MINERAL OR SLAG WOOL
C03
GLASS; MINERAL OR SLAG WOOL
C03B
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C03B
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
C03B5/00
Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
C03B5/00
Melting in furnaces; Furnaces so far as specially adapted for glass manufacture