短語詞組短語articulated spool piece 鉸接聯(lián)接短琯段removable spool piece 可拆短琯new spool piece 新建膨脹彎leg spool piece 折線形法蘭聯(lián)接短琯段spool piece installation 膨脹彎安裝SPOOL PIECE MARKING 琯件標(biāo)記spool piece spool 琯段flanged spool piece 雙法蘭短琯blind flanged spool piece 盲法蘭短琯 返回 spool piece