sounding balloon /SCIENCE/
[DE] Versuchsballon
[EN] sounding balloon
[FR] ballon de sondage aérologique; ballon-sonde
meteorological balloon,sounding balloon /SCIENCE,TECH/
[DE] Radiosonde; Registrierballon; Sondierballon
[EN] meteorological balloon; sounding balloon
[FR] ballon-sonde