collision theory hard sphere theory
hard sphere theory collision theory
lipoid-sieve theory lipoid-filter theory
TRIZ theory of inventive problem solving theory
TRIZ发明问题解决理论理论
TRIZ理论发明问题解决理论
agricultural sector in Taiwan
Agricultural Sector Model
alluvial-pluvial sector
Anhui sector of the Tan-Lu fault zone
broad jump last step of run-up legs’ angle of sector