Classification
TKJ - Traffic
UHK - Traffic and environment - incl. automobile exhaust gas
11
ETF - Fuel cells - general
9
ESB - Hydrogen energy
4
ETC - Energy conversion
3
TAT - Engineering Standards
3
ETA - Energy storage
2
YPM - National economy
2
AXD - Local studies
1
CNWK - Electric batteries
1
CXX - Hydrogen production - chemistry and technology
1
EBA - Energy production, energy technology
1
EHA - Renewable energy sources
1
ENA - Energy from biomass and waste
1
ESA - Synthetic fuels - utilization
1
EUU - Cogeneration
1
FAP - Advanced materials - development and applications
1
FNPH - Ceramics for specific applications
1
FNV - Composite materials, fiber materials
1
FNX - Carbon, carbon materials
1
GUAB - Geography - anthropological
1
LCK - Ecology - general aspects
1
TGBE - Electric and electronic measurement
1
THK - Joining - welding, brazing, soldering
1
TKH - Air flight, space flight
1
TKL - Mining - technical aspects
1
UHCH - Urban areas
1
YBB - Law - general
1
YPO - Economic policy
1
YUS - Other statistical data
1