安全关切 security concerns

战略安全关系 strategic security relationship

安全关联 Security Association ; SA ; IKE SA

全开全关 Full ON Full OFF ; FOFO

安全关键 Safety-Critical ; security-critical

安全关联数据库 SADB ; Security Association Database

安全关键系统 safety-critical system ; Safety critical systems

安全关闭 safety shutdown ; SHUTDOWN ; Safety Shut-off