【电学】天线转换开关【电学】空中切换，扫描

overhead line (aerial line)

crossed aerial (turnstile, cross-dipole), crossed loop aerial

aerial ropeway (aerial cableway, aerialrailway)

aerotriangulation by independent model【测】;independent model aerial triangulation【测】

devices affording protection of an aerial line

aerial photogrammetry【测】;aerial photographic surveying【测】;aerial surveying【测】

rope (carrying rope) aerial ropeway (aerial cableway)

turning-machine for bevelling the ends of bars, tubes beverage aerial