Istifoda shuda dar tarkibi sistemai zamin, molniyazashita va uravnivaniya potencialho. Moqsad baroi qabul kardan (paralel va perpendicular) aloqahoi gumbazi zanjirshuda (tokootvodho) ba fal'tsai krovli pokritiyai fal'tsiyai krovli.
Az stal ba pokritii garmoi tsink bo GOST 9.307-89.
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