The present invention proposes a court, which is a half- or full-court in which ball sports, such as soccer (penalty kicks), foot volleyball, volleyball, and basketball (3×3 basketball), can be played. The court allows balls to be automatically and rapidly supplied in the case where it takes time to resume a game, such as a case where a game is replayed or a case where a ball is out according to the characteristics of each type of sport, or in the case where serve-reception practice is required, and also allows balls to be naturally collected and lifted because the court is inclined and allows the balls to be automatically classified according to the types of balls and to be supplied to the court.

The automatic fire extinguisher is a fire retardant dispensing device. The automatic fire extinguisher is an automated device. The automatic fire extinguisher is an explosive device. The automatic fire extinguisher is a temperature sensitive device that releases a fire retardant in the form of a gas when a predetermined ambient temperature has been reached. The automatic fire extinguisher comprises a compressed retardant gas, a high-pressure gas tank, and an explosive device. The high-pressure gas contains the compressed retardant gas and the explosive device. The explosive device detonates when the ambient temperature reaches when the predetermined ambient temperature is reached. The explosion of the explosive device ruptures the high-pressure gas tank thereby releasing and dispersing the compressed retardant gas into the atmosphere.

The automatic fire extinguisher is a fire retardant dispensing device. The automatic fire extinguisher is an automated device. The automatic fire extinguisher is an explosive device. The automatic fire extinguisher is a temperature sensitive device that releases a fire retardant in the form of a gas when a predetermined ambient temperature has been reached. The automatic fire extinguisher comprises a compressed retardant gas, a high-pressure gas tank, and an explosive device. The high-pressure gas contains the compressed retardant gas and the explosive device. The explosive device detonates when the ambient temperature reaches when the predetermined ambient temperature is reached. The explosion of the explosive device ruptures the high-pressure gas tank thereby releasing and dispersing the compressed retardant gas into the atmosphere.

A fire suppression device may be launched from a hand-held, stand alone, or object- or vehicle-mounted device. The fire suppression device may be propelled by a first accelerant ejected out of a proximal end of the fire suppression device. The fire suppression device may be ruptured by a second accelerant after a predetermined amount of time. A fire suppressant may be dispersed on a fire when the fire suppression device is ruptured.

A fire suppression device may be launched from a hand-held, stand alone, or object- or vehicle-mounted device. The fire suppression device may be propelled by a first accelerant ejected out of a proximal end of the fire suppression device. The fire suppression device may be ruptured by a second accelerant after a predetermined amount of time. A fire suppressant may be dispersed on a fire when the fire suppression device is ruptured.

[Problem] To provide a fire-extinguishing liquid agent in which a fire-extinguishing agent is contained in a desirable balance and is satisfactorily dissolved in a solvent, that is easy to use, and that can be used against normal fires and oil fires, as well as fire-extinguishing equipment loaded with said fire-extinguishing liquid agent. [Solution] A fire-extinguishing liquid agent is sealed in an impact breakable container B that is molded by using a polystyrene resin material in which a general-purpose polystyrene and a styrene-butadiene copolymer are mixed and that has a hand-throwable size, wherein the fire-extinguishing liquid agent is formed: by containing 68-76 parts of sodium bicarbonate (NaHCO.sub.3) relative to 100 parts by weight of ammonium chloride (NH.sub.4Cl); by being treated by passing through a magnetic field having a magnetic flux density of 3000-10000 G; by being dissolved in hot water (magnetic water) in which the temperature thereof is adjusted to 30-50 C.; and by being adjusted to have a pH in a range of 7.5-10.

[Problem] To provide a fire-extinguishing liquid agent in which a fire-extinguishing agent is contained in a desirable balance and is satisfactorily dissolved in a solvent, that is easy to use, and that can be used against normal fires and oil fires, as well as fire-extinguishing equipment loaded with said fire-extinguishing liquid agent. [Solution] A fire-extinguishing liquid agent is sealed in an impact breakable container B that is molded by using a polystyrene resin material in which a general-purpose polystyrene and a styrene-butadiene copolymer are mixed and that has a hand-throwable size, wherein the fire-extinguishing liquid agent is formed: by containing 68-76 parts of sodium bicarbonate (NaHCO.sub.3) relative to 100 parts by weight of ammonium chloride (NH.sub.4Cl); by being treated by passing through a magnetic field having a magnetic flux density of 3000-10000 G; by being dissolved in hot water (magnetic water) in which the temperature thereof is adjusted to 30-50 C.; and by being adjusted to have a pH in a range of 7.5-10.

The present invention proposes a court, which is a half- or full-court in which ball sports, such as soccer (penalty kicks), foot volleyball, volleyball, and basketball (33 basketball), can be played. The court allows balls to be automatically and rapidly supplied in the case where it takes time to resume a game, such as a case where a game is replayed or a case where a ball is out according to the characteristics of each type of sport, or in the case where serve-reception practice is required, and also allows balls to be naturally collected and lifted because the court is inclined and allows the balls to be automatically classified according to the types of balls and to be supplied to the court.

A control mechanism of a vehicle-mounted system for electromagnetic launch of fire extinguishing bombs for high-rise buildings is provided. A stress wave amplifier is fixedly connected to a secondary coil, a primary coil is fixedly connected to a coil base, a guide shaft passes through a central hole in the primary coil and the coil base, and a head of the guide shaft is fixedly connected to the secondary coil. A step-up transformer TM1 boosts a 380-V alternating current and changes it to direct current to charge a pulse capacitor C1 and store energy in the pulse capacitor C1. A discharge thyristor M3 is triggered, and the pulse capacitor C1 releases the energy instantaneously. A stress wave is generated between the primary coil and the secondary coil. The stress wave is transmitted to a fire extinguishing bomb through the stress wave amplifier, to launch the fire extinguishing bomb.

A control mechanism of a vehicle-mounted system for electromagnetic launch of fire extinguishing bombs for high-rise buildings is provided. A stress wave amplifier is fixedly connected to a secondary coil, a primary coil is fixedly connected to a coil base, a guide shaft passes through a central hole in the primary coil and the coil base, and a head of the guide shaft is fixedly connected to the secondary coil. A step-up transformer TM1 boosts a 380-V alternating current and changes it to direct current to charge a pulse capacitor C1 and store energy in the pulse capacitor C1. A discharge thyristor M3 is triggered, and the pulse capacitor C1 releases the energy instantaneously. A stress wave is generated between the primary coil and the secondary coil. The stress wave is transmitted to a fire extinguishing bomb through the stress wave amplifier, to launch the fire extinguishing bomb.