下球夹
/ˈləʊə ˈmantəl/
n
English: lower sphere clamp · 下球夹
English · lower sphere clampEspañol · abrazadera inferiorFrançais · bague inférieure de blocage de la sphère
释义：Two clamps secure the glass sphere into the position required to obtain an exact measure of sunshine; this position is based on the coordinates of the meteorological station.