Air-tight sintering furnace for the production of a quartz prefo
Apparatus for casting silicon with gradual cooling
Apparatus for forming a porous glass preform
Apparatus for making polycrystalline articles
Apparatus for making quartz glass crucibles
Apparatus for making quartz glass crucibles
Apparatus for manufacture of a silica optical fiber
Apparatus for manufacturing hollow and solid ingots
Apparatus for producing a foamed-glass or foamed-ceramic strip
Apparatus for silica crucible manufacture