Registrierballon,Wetterballon /SCIENCE/
[DE] Registrierballon; Wetterballon
[EN] registering balloon
[FR] ballon-sonde
Radiosonde,Registrierballon,Sondierballon /SCIENCE,TECH/
[DE] Radiosonde; Registrierballon; Sondierballon
[EN] meteorological balloon; sounding balloon
[FR] ballon-sonde