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Explanation: It's true that a schwellende Belastung is a dynamic load, but more specifically it's a pulsating load, which means that it varies in strength but not in direction -- as opposed to an alternating load (wechselnde Belastung), which varies in both strength and direction. The difference is significant!
REf: Stahleisen, Wörterbuch der Betreibsfestigkeit
Ken Cox Local time: 22:01 Native speaker of: English PRO pts in pair: 5905