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In the No. 1 workshop of the Torch Factory, the trainee craftsmen are sitting on a table of ten people, carefully checking the hardness and toughness of the firing device to ensure that each piece can meet the standard.

Today's firecracker factories basically adopt an assembly line method, and each of them produces the accessories required for firecrackers separately.

This not only simplifies the process, improves the quantity and quality of production, but also plays a role in confidentiality.

As the quality of the firing mechanism improves, especially the hardened springs

"I, the king of the world! 》222 Duty-free, factory is in the middle of the hand, please wait a moment,

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