I-Sub Entry Shroud yi-tube ephezulu ye-refractory eyenziwa yinkqubo yoxinzelelo lwe-isostatic, eyenzelwe ukulawulwa kokuhamba kwensimbi etyhidiweyo ukusuka kwi-tundish ukuya kwi-crystallizer, kwaye isetyenziswa ngokubanzi kwinkqubo eqhubekayo yokuphosa kwishishini lensimbi.
