短语词组短语hoop -iron bond 铁箍连接spiral hoop -iron 螺旋钢箍Polygon forming hoop -iron machine 多边形箍筋机stra ing machine for hoop -iron 铁带打包机hoop iron band 箍铁皮holt hoop iron method 抱箍法galvanized hoop iron 镀锌铁箍 返回 hoop iron