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Ucango lweglasi olugqwesileyo olungenamlilo luvuthelwa kwidangatye lobushushu obuphezulu obungaphezulu kwe-1,000 degrees. Emva kovavanyo, inokugcinwa imizuzu engama-90 okanye ngaphezulu ngaphandle kokunyibilika okanye ukuqhuma. Iglasi ekwazi ukumelana nomlilo ekumgangatho ophezulu isekwimo ye-obtuse-angle emva kokwaphuka, kwaye amaqhekeza mancinci kuneeglasi epholileyo.

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