Abstract: Disclosed is the operation method of a washing machine, including: a washing step for washing laundry; a rinsing step for rinsing the laundry by supplying water after performing the washing step and including a remaining water removal process; and a final dehydrating step for dehydrating the laundry after performing the rinsing step. The detergent solution with a certain concentration remaining inside the washing machine can be removed through the remaining water removal process, thereby preventing the contamination of supplied clean water due to the detergent solution, thus to smooth the rinsing process of the laundry. In addition, a problem of detergent remnants in the laundry after the rinsing step can be solved.

Abstract: Disclosed is the operation method for a towel-washing course in a washing machine, in which the towel is dehydrated at the spin speed of 900 rpm and 1100 rpm, which is greater than the spin speed (800 rpm) of the drum in the main dehydration process for general laundry, a water level of 22 kHz or 23 kHz, higher than a water level (23.2 kHz) for the general laundry, is supplied to the towel, the towel has a rinse time of 8 or 12 minutes, which is longer than that of 4 minutes for the general laundry, and rinse temperature for the towel is in the range of 50° C.˜60° C., relatively higher than that of 40° C. used to rinse the general laundry. Further, the rinse process having the remaining water removal process is performed between the main dehydration and the water supply, thereby removing detergent solution with a certain concentration from the inside of the washing machine after completing the main dehydration process.

Abstract: Disclosed is a drum type washing machine having a touch up function and a method for touching up thereof. The drum type washing machine having the touch up function is provided with a touch up button for removing wrinkles on laundry left in the drum type washing machine and a method for touching up. Accordingly, it is not required for a user to additionally execute rinsing and dehydrating processes, or ironing so as to remove wrinkles on the laundry, thus it is convenient. And, since it is not required to additionally execute the rinsing and dehydrating processes, it is capable of preventing unwanted consumption of water and electricity.

Abstract: The present invention relates to a method for billing and a device thereof and more particularly relates to the method and the device for dividing the monthly charges of each subscriber into a personal-use portion and a business-use portion according to the predetermined criteria and divisionally billing each subscriber for the personal-use portion and the entity that will pay for each subscriber regarding the sum of business-use portion.

Abstract: The present invention relates to a method for billing and a device thereof and more particularly relates to the method and the device for dividing the monthly charges of each subscriber into a personal-use portion and a business-use portion according to the predetermined criteria and divisionally billing each subscriber for the personal-use portion and the entity that will pay for each subscriber regarding the sum of business-use portion.

Abstract: The present invention relates to a batch typed billing method and system by using dispersed processing. One aspect of the present invention is a method for batch typed billing in an on-line system and a billing system which have at least one database jointly, wherein the on-line system for operating custom management and the billing system for billing charges are designed for dispersed processing their own task, comprising of the steps of converting a first database which the on-line system and the billing system have jointly, into the state after that time of submitting the current month bill; copying a second database from the converted first database; performing billing by using the second database on the basis of a billing account; and synchronizing the second database with the first database.