| adjustable union | 可调活接头 |
| chemical union | 化合 |
| customs union | 关税同盟 |
| disunion | 分离 |
| elbow union | 弯头活接头 |
| European Economic and Monetary Union | 欧洲经济与货币同盟 |
| European Monetary Union | 欧洲货币联盟 |
| female union | 活接头扣圈 |
| flange union | 法兰联管节 |
| flexible pipe union | 挠性联管节 |
| four-way union | 十字接头 |
| ground-seat union | 接合面密封的由壬 |
| hex union | 六角接头 |
| hose union | 水龙头活接头 |
| industrial union | 产业工会 |
| Inter-Union Commission on Geodynamics | 国际地球动力学联合会 |
| International Union of Geodesy and Geophysics | 国际大地测量与地球物理学协会 |
| International Union of Geological Sciences | 国际地质科学联合会 |
| misalignment union | 非直线活动接头 |
| pipe union | 管子活接头 |
| quick union | 快接接头 |
| reunion | 再结合；重聚 |
| screw pipe union | 螺纹管节 |
| socket union | 凹口管节 |
| swivelling union | 旋转活接头 |
| T-union | T形接管 |
| trade union organisation | 工会组织 |
| trade union | 工会；行业工会 |
| union due | 工会会费 |
| union flange | 管节法兰 |
| Union for the Protection of Industrial Property | 保护工业产权联盟 |
| union gate | 或门 |
| union joint | 管节连接 |
| union nut | 联管螺母 |
| Union Oil Company of California | 加利福尼亚联合油公司 |
| union purchase system | 双杆联吊起重系统 |
| union wrench | 联管节扳手 |
| union | 连接；联管节 |
| unionization | 不电离 |
| wing union | 翼状活接头 |