Iskani niz je bil najden v PREVODIH:
Rückflussverhinderer
en back siphonage preventer, backflow preventer, check valve, non-return device
Rückfrage
en call back, call waiting, callback, check back, check-back, checkback, further inquiry, inquiry, inverse connection, query, request, return question
Rückfragehäufigkeit
en call-back frequency, check back frequency, repetition rate, return-question frequency
Rückführgröße
en check back, checkback signal, checkback, feedback variable, feedback, variable feedback