Classification
YFF - Industrial safety regulations
TAT - Engineering Standards
13
TEA - Electrical engineering - general
10
TEDF - Electric power application
9
TEF - Electric machines, electric cables
2
THD - Design and construction in mechanical engineering
2
THH - Machines
2
THHD - Machine parts
2
HYG - Occupational medicine, sports medicine
1
TIG - Reliability, safety, quality control
1