Abstract: A circulatory washing machine, in which water stored in the bottom of a tub is circulated and supplied to a drum. The washing machine includes a tub for containing washing water; a drum rotatably installed in the tub; a circulation unit for circulating the washing water stored in the tub to the upper portion of the drum; and a spray nozzle for spraying the washing water, circulated by the circulation unit, to the rear portion of the inside of the drum.

Abstract: Disclosed is an on-line quality prediction system for stainless steel slab and the predicting method using it, which can allow produced slab quality to predict in high precision on the on-line using a network based system by collecting all operation data available from a steel making process to a continuous casting process and then using them as a metallurgical calculation evaluating model through thermodynamics and statistics programs, the system comprises: a main computer collecting and storing information from a production line for the stainless steel slab; a thermodynamics calculation only computer mutually communicating with the main computer; and a server computer mutually communicating with the main computer, whereby it can overcome a limitation of a predicting method due to existing operation data and allow produced slab quality to predict in high precision on the on-line using a network based system by collecting all operation data available from a steel making process to a continuous casting process

Abstract: An input buffer circuit for converting a TTL(TTL:Transistor transistor logic) level signal supplied from an outside into an internal CMOS level signal. The input buffer circuit comprises a power voltage terminal supplied with a power voltage, a power voltage sensing signal generator for detecting a level of the power voltage by inputting as source power the power voltage supplied to the power voltage terminal and for outputting a power voltage sensing signal respondent to the detected level, and switching means for convening an external signal into an internal signal and for performing an switching operation in response to a level of the power voltage sensing signal positioned on an output path to output the convened signal.