Abstract: Disclosed is a method for supplying air to a cluster hammer in which a nozzle has been installed. An air distribution block 1 including an air distribution nozzle 3 formed therein is disposed under an air inlet cover 4 of the cluster hammer, into which air is introduced. The hammers 10 are disposed under the air distribution block 1 respectively. Compressed air which has passed through the air distribution nozzle 3 is supplied to each of the hammers 10, and then the hammer 10 is operated. Even when the hammer 10 installed in the cluster hammer is in a flushing position, the cluster hammer is smoothly operated without creating the problems in the operation of the other hammers.

Abstract: The present invention relates to an intelligent central surveillance server system and controlling method thereof, which are capable of determining whether or not a preset event occurs based on a sensor sense signal and/or a motion sense signal and transmitting/receiving image information obtained in the occurrence of event through a serve-client system. The intelligent central surveillance server system comprises: a sensor unit configured to sense and transmit a sense signal; a camera unit configured to pick and transmit video information; and a digital video transmitter configured to determine whether or not a preset event occurs, based on the sense signal and/or the video information, and transmit first video information and first list information related to the first video information on the basis of the point of occurrence of event when the preset event occurs.