? ?? ?? ??? ?? ? ???? ???? ?? ???? ????? ?? ???? ? ?? ???? ?? ‘????’ ??? ????.

? ???? ?? ???? ???? ?? ????? ?????? ?? ??? ??? ‘??????’. ??? ????? ???? ????? ‘????? ????’? ???? ????? ?? ‘????’?? ??? 13? ??? ? ???.

????? ‘????? ???’??? ??? ??? R&D? ??? ?? ?? ???? ????, 3? ???? ???? ? ???? ??? ????.

????? ??? 1851? ??? ?? ‘??’?. ?? ??? ?????? ??????? ??? ????? 1915? ???? ‘????’? ???? ????50??? ‘????’, 70?? ‘??’, 80?? ‘??’? ????? ??? ‘??? ???’ ????? ???? ???? ??.

??? 97? CCPC(Corning Consumer Product Company)?? ???? ???? ??? ????. 99? CCPC? 100?? ??? ?? ???? ???? ????? GHC? ?????? ???? ‘????’?? ???.

????? ????? 1974? ????? ????? ??? ??? ??? ????? ????? ??????¤? ????? ???? ??.

????? ??? ?????? ? 900??, ?????? ? 20???(? 2???)? ??? ??? ??.

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