efficiency of biological system
function in biological system
living biological system
System biological engineering
phycosphere biological system
analog computing system
analog-digital computing system
analogdigital computing system
模拟数字计算系统
紧急跳闸系统
危急遮断控制系统
危急保安系统
auxiliary computing system
computing system coupler
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