outside single-point thread tool英 [ˌaʊtˈsaɪd ˈsɪŋɡl pɔɪnt θred tuːl]美 [ˌaʊtˈsaɪd ˈsɪŋɡl pɔɪnt θred tuːl]单刃外螺纹刀具机械
