Classification
CWE - Chemical engineering, chemical industry - general
4
CWOE - Crushing, grinding, milling
2
YBB - Law - general
2
CBA - Gmelin handbook
1
LVH - Food science - technologies
1
TBF - Semiconductor devices
1
THA - Mechanical engineering - general
1
THH - Machines
1
TIE - Process engineering
1
UCJ - Environmental protection - general aspects
1