Classification
TAT - Engineering Standards
7
TEF - Electric machines, electric cables
TEA - Electrical engineering - general
2
YFF - Industrial safety regulations
2
TEDF - Electric power application
1
THD - Design and construction in mechanical engineering
1
THH - Machines
1
THHD - Machine parts
1
TIF - Industrial ( occupational ) safety
1
TIG - Reliability, safety, quality control
1
UAU - Fire, fire protection, safety at the workplace, prevention of accidents
1