部分牌号无涂层电解镀锌热镀锌锌铁DX52DH180BH180B+ZEH180BD+ZH180BD+ZFDX53DH220BH220B+ZEH220BD+ZH220BD+ZFDX54DH260BH260B+ZEH260BD+ZH260BD+ZFDX56DH300BH300B+ZEH300BD+ZH300BD+ZFDX57DHC260LAHC260LA+ZEHC220LAD+ZDD14HC300LAHC300LA+ZEHC300LAD+ZHC180YHC340LAHC340LA+ZEHC340LAD+ZHC220YHC380LAHC380LA+ZEHC380LAD+ZHC260YH***20LAH***20LA+ZEH***20LAD+ZHC220LAHC260XHC260X+ZEHC260XD+ZHC260LAHC300XHC300X+ZEHC300XD+ZHC300LAHC340XHC340X+ZEHC340XD+ZHC340LAH***50XH***50X+ZEHC380LAHC550XH***20LAHC700XHC300WHC380WH***00THC600CHC680C)