Galvanized gas pipe的意思|示意

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镀锌气管

镀锌煤气管 ... Galvanized Welded Pipe 镀锌焊管 Galvanized gas pipe 镀锌煤气管 ; 镀锌瓦斯嗓 lined galvanized steel pipe 有内搪层镀锌钢管 ...

镀锌瓦斯嗓 ... Galvanized Welded Pipe 镀锌焊管 Galvanized gas pipe 镀锌煤气管 ; 镀锌瓦斯嗓 lined galvanized steel pipe 有内搪层镀锌钢管 ...