interior dome shell
/ɪntˈiəɹiə ˈdəʊm ˈʃɛl/
n
English · interior dome shell中文 · 圆顶内壳Español · cubierta interior de la cúpulaFrançais · enveloppe intérieure
意味：Regulates the temperature of the telescope so as to avoid air turbulence and prevent the mirror from becoming deformed.