Tractors, machinery for agriculture and forestry, powered lawn and
garden equipment — Symbols for operator controls and other displays —
Part 2: Symbols for agricultural tractors and machinery — Amendment 1
Industrial automation systems and integration — Product data
representation and exchange — Part 1172: Application module: Class of
connection of activity
Acoustics — Measurement of sound insulation in buildings and of building
elements — Part 14: Guidelines for special situations in the field —
Technical Corrigendum 1