Key words: Key words:solid lubricant
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
1 β-methyl carbapenem’s key intermediates
25 items key requirements
ABC key -point management
abstracting of key frame
accept command key indicator