| 摘要 |
PROBLEM TO BE SOLVED: To provide a cleaning method of a metal strip capable of suppressing a waste liquid treatment cost and obtaining a high cleaning effect even in the case of a low jetting pressure. SOLUTION: A cleaning liquid and the water like hard water, etc., for a pressure liquid are used, when cleaning the metal strip by injecting the pressure liquid to the metal strip in the cleaning liquid, a back pressure of the cleaning liquid is adjusted based on a jetting pressure of the pressure liquid.
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