broken n transit instrument折轴中星仪
broken telescope transit折轴子午仪
broken back transit折轴经纬仪
broken transit instrument[天] 折轴中星仪
broken-telescope transit折镜子午仪
broken-back transit[光] 折轴经纬仪
broken-telescope e transit折轴子午仪
broken-back ĥ transit折轴经纬仪
broken-back E transit折轴经纬仪