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SECTION A — HUMAN NECESSITIES | |
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SECTION B — PERFORMING OPERATIONS; TRANSPORTING | |
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SECTION C — CHEMISTRY; METALLURGY | |
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SECTION D — TEXTILES; PAPER | |
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SECTION E — FIXED CONSTRUCTIONS | |
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SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING | |
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SECTION G — PHYSICS | |
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SECTION H — ELECTRICITY | |
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