Abstract: A pulverized coal-fired boiler efficiently supplies air to a central part of a furnace and the neighborhood of a furnace wall, thereby promoting mixture with combustion gas, and reducing both NOx and CO. The main after air ports are structured so as to jet air having a large momentum for enabling arrival at the central part of the furnace, and the sub-after air ports are structured so as to jet air having a small momentum to the neighborhood of the wall face of the furnace, and a sectional center of each of the sub-after air ports is within a range from 1 to 5 times of a caliber of the main after air ports from a sectional center of each of the main after air ports.

Abstract: A pulverized coal-fired boiler efficiently supplies air to a central part of a furnace and the neighborhood of a furnace wall, thereby promoting mixture with combustion gas, and reducing both NOx and CO. The main after air ports are structured so as to jet air having a large momentum for enabling arrival at the central part of the furnace, and the sub-after air ports are structured so as to jet air having a small momentum to the neighborhood of the wall face of the furnace, and a sectional center of each of the sub-after air ports is within a range from 1 to 5 times of a caliber of the main after air ports from a sectional center of each of the main after air ports.

Abstract: A bat includes a handle having a handle joint, a barrel having a barrel joint and a barrel joint opening at an end of the barrel joint, and a connector connecting the handle joint and barrel joint together. The barrel joint has a first support hole formed proximal to the barrel joint opening, a second support hole formed distal to the barrel joint opening and having a larger diameter than the first support hole, and a receiver formed between the first and second support holes orthogonal to an axis of the holes. The connector has a handle connection connected to the handle joint, a first barrel connection formed on an outer periphery of the connector and engaging with the first support hole, a second barrel connection formed on an outer periphery of the connector and engaging with the second support hole.

Abstract: A pulverized coal burning boiler is provided, which reduces an air-excess ratio thereby to reduce the emission of unburned contents such as CO. The pulverized coal burning boiler includes a pulverized coal feed measuring device for measuring the feeding rates of the pulverized coal to be conveyed through coal feeding pipes, individually, and a control device for calculating the burning air feeding rates to match the pulverized coal feeding rates thereby to send a control command signal to burning air feed adjusting device, so that a burner air ratio set by a burner air ratio setting device may be kept on the basis of both the pulverized coal feeding rate, which is measured by the pulverized coal feed measuring device, and the burning air feeding rate, which is measured by the burning air feeding rate measuring device and fed to a pulverized coal burner connected to the coal feeding pipes.

Abstract: A bat for baseball or softball of the present invention includes a first tube having an impact part, a step part and a stopper part, a cylindrical second tube, a fixing component being inserted between the first tube and second tube, the step part having an exterior diameter larger than that of the impact part and smaller than an interior diameter of the second tube, the stopper part having an exterior diameter larger than that of the step part and large than the interior diameter of the second tube, the second tube is held of an exterior periphery of the impact part, one end of the second tube is fixed between the stopper part and the step part by an adhesive and the other end is fixed by an adhesive on the fixing component, and a crevice is formed between the first tube and the second tube.

Abstract: A bat for baseball or softball of the present invention includes a first tube formed from FRP or synthetic resin having a part to be hit and a stopper part, a cylindrical second tube having two ends which are open and including at least two or more layers, a first fixing component including a body part, an interior periphery surface of the body part is fixed to the first tube, a second fixing component including an insertion part, and a gap located between the first tube and the second tube and being formed by the second tube being attached to an exterior periphery of the first tube, one end of the second tube being fixed to an exterior periphery surface of the body part, and the other end of the second tube being fixed to the insertion part which is inserted between the first tube and the second tube.

Abstract: A bat for baseball or softball of the present invention includes a first tube having an impact part, a step part and a stopper part, a cylindrical second tube, a fixing component being inserted between the first tube and second tube, the step part having an exterior diameter larger than that of the impact part and smaller than an interior diameter of the second tube, the stopper part having an exterior diameter larger than that of the step part and larger than the interior diameter of the second tube, the second tube is arranged on an exterior periphery of the impact part, one end of the second tube is fixed between the stopper part and the step part by an adhesive and the other end is fixed by an adhesive on the fixing component, and a crevice is formed between the first tube and the second tube.

Abstract: A bat includes a handle having a handle joint, a barrel having a barrel joint and a barrel joint opening at an end of the barrel joint, and a connector connecting the handle joint and barrel joint together. The barrel joint has a first support hole formed proximal to the barrel joint opening, a second support hole formed distal to the barrel joint opening and having a larger diameter than the first support hole, and a receiver formed between the first and second support holes orthogonal to an axis of the holes.

Abstract: A bat for baseball or softball of the present invention includes a first tube having an impact part, a step part and a stopper part, a cylindrical second tube, a fixing component being inserted between the first tube and second tube, the step part having an exterior diameter larger than that of the impact part and smaller than an interior diameter of the second tube, the stopper part having an exterior diameter larger than that of the step part and large than the interior diameter of the second tube, the second tube is held of an exterior periphery of the impact part, one end of the second tube is fixed between the stopper part and the step part by an adhesive and the other end is fixed by an adhesive on the fixing component, and a crevice is formed between the first tube and the second tube.

Abstract: A bat for baseball or softball of the present invention includes a first tube having an impact part, a step part and a stopper part, a cylindrical second tube, a fixing component being inserted between the first tube and second tube, the step part having an exterior diameter larger than that of the impact part and smaller than an interior diameter of the second tube, the stopper part having an exterior diameter larger than that of the step part and large than the interior diameter of the second tube, the second tube is held of an exterior periphery of the impact part, one end of the second tube is fixed between the stopper part and the step part by an adhesive and the other end is fixed by an adhesive on the fixing component, and a crevice is formed between the first tube and the second tube.

Abstract: A pulverized coal-fired boiler efficiently supplies air to a central part of a furnace and the neighborhood of a furnace wall, thereby promoting mixture with combustion gas, and reducing both NOx and CO. The main after air ports are structured so as to jet air having a large momentum for enabling arrival at the central part of the furnace, and the sub-after air ports are structured so as to jet air having a small momentum to the neighborhood of the wall face of the furnace, and a sectional center of each of the sub-after air ports is within a range from 1 to 5 times of a caliber of the main after air ports from a sectional center of each of the main after air ports.

Abstract: A bat for baseball or softball of the present invention includes a first tube formed from FRP or synthetic resin having a part to be hit and a stopper part, a cylindrical second tube having two ends which are open and including at least two or more layers, a first fixing component including a body part, an interior periphery surface of the body part is fixed to the first tube, a second fixing component including an insertion part, and a gap located between the first tube and the second tube and being formed by the second tube being attached to an exterior periphery of the first tube, one end of the second tube being fixed to an exterior periphery surface of the body part, and the other end of the second tube being fixed to the insertion part which is inserted between the first tube and the second tube.

Abstract: A bat for baseball or softball of the present invention includes a first tube having an impact part, a step part and a stopper part, a cylindrical second tube, a fixing component being inserted between the first tube and second tube, the step part having an exterior diameter larger than that of the impact part and smaller than an interior diameter of the second tube, the stopper part having an exterior diameter larger than that of the step part and larger than the interior diameter of the second tube, the second tube is arranged on an exterior periphery of the impact part, one end of the second tube is fixed between the stopper part and the step part by an adhesive and the other end is fixed by an adhesive on the fixing component, and a crevice is formed between the first tube and the second tube.

Abstract: A bat for baseball or softball of the present invention includes a first tube having an impact part, a step part and a stopper part, a cylindrical second tube, a fixing component being inserted between the first tube and second tube, the step part having an exterior diameter larger than that of the impact part and smaller than an interior diameter of the second tube, the stopper part having an exterior diameter larger than that of the step part and large than the interior diameter of the second tube, the second tube is held of an exterior periphery of the impact part, one end of the second tube is fixed between the stopper part and the step part by an adhesive and the other end is fixed by an adhesive on the fixing component, and a crevice is formed between the first tube and the second tube.

Abstract: A golf club shaft includes a first strain gauge attached to a first side of the shaft facing the striking direction, a second strain gauge attached to a second side of the shaft facing the address direction at right-angles to the striking direction, and a third strain gauge which is capable of measuring the twist of the shaft. Detection signals from the strain gauges are used to classify a shaft into four types according to the swing type of a golfer in accordance with at least torque or kick point.