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Category 4 pyrotechnic articles are products that have a lot more active loads than those intended for public use (category F1, F2, F3). Both the net amount of pyrotechnic composition (NEC) and the preparatory operations that must be undertaken by the pyrotechnic team require organizing the activity in order to anticipate and eliminate the risks to which the workers of the pyrotechnic team, the public, or the targets in the adjacent area may be subject.[4] Performing fireworks with pyrotechnic articles for profess...