＜正＞ The research of the historical record of icefails brings together many cases that areapparently similar（1-3）.Practically allclear-sky ice falls were not appropriatelyresearched because they were routinelyassigned,without verification,to aircrafticing processes,to wastewater from air-craft lavatories（blue ice）,or to the leakageof aircraft water tanks.However,it isimportant to take into account,first,thatdocumented historical references aboutthese events go back to the first half ofthe 19th century,so many cases existedbefore the invention of airplanes（1-3）,and second,that a detailed search ofscientific databases（Web of Science,GeoRef）regarding well-known aircrafticing nrocesses revealed a lack of prece-
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机译：Limitation of cross country fault currents in MV distribution networks by current limiting reactors connected between cable screens and primary substation earth electrode
