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Umpoler m
tech.	polarity reverser; plugging switch
transp., el.	pole changer; pole reverser
umpolen v
gen.	reverse the polarity of
meas.inst.	change the polarity; reverse (current)
tech.	change over; change polarity; plugging; polarity reversal; reverse; reversing
umpolend v
gen.	reversing the polarity of