اقرا ايضاجميع كتالوجات مخارج الهواء
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اقرا ايضاHVAC PDF PART 1
NFPA publishes more than 300 consensus codes and standards intended to minimize the possibility and effects of fire and other risks. NFPA codes and standards, administered by more than 250 Technical Committees comprising approximately 8,000 volunteers, are adopted and used throughout the world.
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