短語詞組短語threaded union rubber joint 螺紋活接頭union n joint 連接頭straight union joint 直管活接頭;詳細(xì)翻譯union joint west bank 管子接頭flat union joint 平面連接elbow union joint 彎管連接頭union of intervertebral joint 椎體間關(guān)節(jié)融合tank union joint 水箱接頭handy union joint 快速接頭 返回 union joint