Abstract: The invention relates to a cleaning method, and in particular, to a vacuum cleaning apparatus and a vacuum cleaning method thereof. A vacuum cleaning method comprising (a) positioning a dust receiver joined to one end of a vacuum suction device in the vicinity of the object of cleaning, (b) positioning a spray nozzle joined to one end of an air spray system adjacent to the object of cleaning, (c) operating the vacuum suction device, and (d) removing the foreign substances adhered to a surface of the object of cleaning by adjusting the pneumatic pressure of the air sprayed from the spray nozzle, may efficiently remove foreign substances adhered to the object of cleaning located in a narrow space.

Abstract: The invention relates to a cleaning method, and in particular, to a vacuum cleaning apparatus and a vacuum cleaning method thereof. A vacuum cleaning method comprising (a) positioning a dust receiver joined to one end of a vacuum suction device in the vicinity of the object of cleaning, (b) positioning a spray nozzle joined to one end of an air spray system adjacent to the object of cleaning, (c) operating the vacuum suction device, and (d) removing the foreign substances adhered to a surface of the object of cleaning by adjusting the pneumatic pressure of the air sprayed from the spray nozzle, may efficiently remove foreign substances adhered to the object of cleaning located in a narrow space.

Abstract: An ultrasonic imaging system for an ultrasonic imaging unit generating ultrasonic image data of an interlaced scanning mode, includes a display of a non-interlaced scanning mode and a scanning mode converter for converting ultrasonic image data of the interlaced scanning mode received from the ultrasonic imaging unit into data of a non-interlaced scanning mode and supplying the ultrasonic image data of the non-interlaced scanning mode to the non-interlaced scanning mode display, to thereby provide an ultrasonic image having a better quality of picture in comparison with the interlaced scanning mode. The only ultrasonic image data in which the ultrasonic image data is displayed together with additional data on a screen by the image display of the non-interlaced scanning mode, is converted in the interlaced mode, thereby recording the ultrasonic image data via the conventional VCR.