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Ermakovich - a device for fixing and centering the coil ERMAKOV-ROST. Ermakovich is clamped into the screwdriver cartridge or drill for a steel shank with a diameter of 5.2 mm.
Details in the video review (see below).
ERMAKOVICH © - the author of the idea, design and name - Korolev Eugene (April 1, 2019).
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