New firecracker blow, essentially characterized in being constituted by an elongated plastic capsule low very flexible pressure, thin-walled, hollow cylindrical, with one closed by a dome body end of the capsule, which takes the form spherical cap, while its other end is opened to introduce the explosive charge, whereupon it is closed with a lid, also of plastic low pressure and thin walls, suitably welded to the walls of the mouth of the capsule, providing also this number of through holes in the walls thereof to allow escape of moisture permeating the explosive charge during the manufacture, subsequent drying effects.
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