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