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изводства стеклоштабиков из переходных тугоплавких стекол с температурой варки 1800- 2000°С.from glass stems from transitional refractory glasses with a cooking temperature of 1800-2000 ° C.
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1.Патент США № 3376373 кл. 13--6,1968.1. US patent number 3376373 cl. 13--6.1968.2.Патент США Ло 3147328, кл. 13-6,1964.2. US patent Law 3147328, cl. 13-6,1964.Э ;jE; j
SU2090700A1975-01-021975-01-02
Electric skull glass furnace
SU561707A1
(en)