Istifoda shuda dar tarkibi sistemahoi zaminzadi, molniezashita va uvarinai potencialho baroi vasl kardanai ploskhoi (az 20x4 mm to 40x5 mm) va ghirdu (diametri az 6 to 12 mm) zaminzadihoi gorizontali va vertikali ba ham ya ba zaminzadi vertikali diametri 18-20 mm.
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