29.120.60 (8)
59.080.60 (94)
83.140.01-10 (1)
83.140.01-20 (2)
83.140.99-20 (9)
91.100.30-20 (1)
91.100.50-10 (2)
91.100.50-20 (2)
99.200.10 (2)
Abrasives (191)
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Elements of buildings in general (31)
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Energy and heat transfer engineering in general (64)
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Graphical symbols for use on electrical and electronics engineering drawings, diagrams, charts and in relevant technical product documentation (13)
Graphical symbols for use on information technology and telecommunications technical drawings and in relevant technical product documentation (61)
Graphical symbols for use on mechanical engineering and construction drawings, diagrams, plans, maps and in relevant technical product documentation (177)
Graphical symbols for use on specific equipment (194)
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IT applications in industry (193)
IT applications in information, documentation and publishing (494)
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IT Security (615)
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