要害部门 meaning in English

vitals

The aseismatic fortify that strengthens crucial point branch and lifeline establishment works
加强要害部门及生命线设施的抗震设防工作。
Commanding communications system ( ccs ) is widely used in army , railway and the state power grids
指挥通信系统(也称调度通信系统)是广泛应用于军队、铁路、电力、水利等国家要害部门的专用通信系统。
Identity authentication has been widely applied in detection of criminal cases , and other domains , which need authentication to control access such as government , custom , and financial department
身份认证广泛应用于刑事案件的侦破，以及其它需要人身鉴定的领域如政府机关、海关、登机、金融等要害部门的出入。