This part of GB/T25020 specifies product category， technical requirements， test methods， inspection rules， marking， delivery certificate， storage and transport of the square steel tube pole for overhead contact line system of electrified railways.This part applies to the square steel tube pole for OCS of electrified railways （hereafter abbreviated as square steel tube pole）. It can be taken as reference for the same type of square steel tube pole of OCS for urban rail transit.
鄂公网安备 42010302001612号 