短語詞組短語pipe screw thread 管螺紋oilfield pipe screw thread 石油管螺紋Pipe -thread 管道式螺紋casing pipe round thread 套管圓螺紋pipe plug thread 管塞螺紋pipe style thread 管道式螺紋petroleum pipe -thread 石油管螺紋Dryseal straight pipe internal thread 干密封燃油直管螺紋PIPE -THREAD SEALANT SYSTEM 管螺紋密封劑 返回 pipe thread