Thanks. I guess it remains a mystery, then.
(And for those of you who wonder what I've been going on about, Test is supposed to contain: "Test" and "Die Waschmaschinentragödie", which had been mentioned in the beginning; some other Pirx tales ("Albatros", "Terminus", and "Der bedingte Reflex"); "Von der Rechenmaschine, die mit dem Drachen kämpfte", whose English equivalent is in Mortal Engines...as well as "Invasion vom Aldebaran".)