Terms for subject Aviation containing threads

English	Chinese
national standard straight pipe threads for hose couplings and nipples	国家标准软管接头和接嘴直管螺纹
national standard straight pipe threads for mechanical joints	国家标准机械接头直管螺纹
national standard straight pipe threads for pressure tight	国家标准压密接头直管螺纹
national standard straight pipe threads in coupling	国家标准接头直管螺纹