| 摘要 |
PROBLEM TO BE SOLVED: To provide a jet firework generating an exciting sound while jetting a spark. SOLUTION: A powder for jet firework is placed in a second tube 13 which is then fitted in a first tube 12 to close a part of the slit 15 made in the first tube 12. A spark is jetted by firing a fuse 19 extending from the powder for jet firework set on the ground and, at the same time, a sound is generated by producing a negative pressure in both tubes thereby sucking outer air through the slit 15 at high speed.
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