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Water-soluble terpolymers made from meth(acrylamide), ethylenically unsaturated, aliphatic carboxylic acid or salt, and polyvinyl monomer, and their use as dry strength additives for paper
System zur steuerung eines gleichstrommotors mit einer zeitgesteuerten schaltung zur erzeugung einer spannungsbezugsgroesse und einer schwellenwertschaltung fuer den drehzahlfehler