Combined intercepting sewer system
deep tunnel intercepting sewer system
positive list system system
7-year system switching to 8-year system
Accounting environment Accounting theoretical system Accounting standards system
bridge transformed from simple-supported system into continuous system
cardiovascular system and cerebrovascular system
C-band unified TTC system and C-band mono-pulse measuring radar system
CF system core flooding system
changing oil system into coal system
emulating system for jacking system
free air temperature increased system FATI system