1, put your hand away, make the skirting board vertical up and down, with the fused end facing down, and gently pinch it in the middle with your hand, not too hard, until it can't fall off.

2, lit with cigarette butts or incense.

3. The lower part rang and the upper part flew into the sky.

4. Attention: Keep away from flammable materials, otherwise it will easily cause fire.

Firecrackers with two kicks are a traditional folk product, which is often used in festivals, weddings, commemorative ceremonies and many other occasions. It is based on the principle that the powder at the bottom is lifted off by the reaction force generated when it hits the ground when it explodes. The paper tube with double kicking firecrackers is divided into two layers, and the function of the lower layer is to send firecrackers to the sky. After the upper layer lifts off 10 ~ 20 meters, it will explode in the air.

In short, kicking two feet is to wrap gunpowder in dense paper, use the expansion generated by gunpowder explosion to fry paper and make noise to entertain the masses. Because there are two sounds, it is called two kicks.

Erguotou is a kind of firecrackers, and its powder is divided into two layers by cement or soil. The "back door" at the bottom is not tightly blocked, and the airflow generated by the lower gunpowder explosion "pinged" through the back door and sprayed downward. The downward jet of air generates upward thrust, pushing firecrackers into the air.

At this time, the fuse just ignited the gunpowder sealed at the upper end, and it quickly burned-exploded, and the second kick blossomed in mid-air. Fireworks also rely on the rapid combustion of gunpowder-the thrust generated by the explosion.

It is dangerous to let it out, big or small. Inferior skirting boards are prone to air leakage and moisture, which will lead to two explosions on the ground, or only one. When purchasing, you should choose a regular manufacturer.