The Russian Wikipedia article cross-linked with the English Wikipedia "Improvised Explosive Device" article via the "Languages" list is https://ru.wikipedia.org/wiki/Самодельное_взрывное_устройство or СВУ. The letters in your image would have to be mirror-image flipped vertically to form valid Cyrillic letters, and then you get ДЕЙ, which ...


Looks like the direct translation of long ton. This translation variant even exists in Wikipedia.

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