horizonn.地平线；眼界；范围Horizon range from an object物标视地平距离horizonal sync discriminator水平同步鉴别器horizonally-polarized wave水平偏振波horizon system of coordinates地平坐标系horizonally-polarized array水平极化天线阵horizon-to-horizon camera三镜头航空摄影机horizon-tal-type generator卧式发生机horizontao section of coal seam煤层水平断面图horizon on some special subject有关某一专题的知识horizonally-polarized antenna水平偏振天线