Central nervous system venous angima
Intracranial venous system
Venous system protection
movable arterial and venous imaging system
Continuous venous venous hemofiltration
continuous venous-venous hemofiltration
positive list system system
inter-backup system for central control system and district-level dispatch system
Single school system; Single track system; Unitary school system
Single track system; Single school system; Unitary school system
Unitary school system; Single school system; Single track system
7-year system switching to 8-year system
Accounting environment Accounting theoretical system Accounting standards system
administrative management system of villages and towns and educational system