| 摘要 |
PROBLEM TO BE SOLVED: To provide a machining method which makes stable machining possible by using water-insoluble oil agent, and in which measures for disaster prevention are sufficient. SOLUTION: In the cutting method in which an aqueous solution is sprayed or jetted to a machining position at the time of machining using water-insoluble cutting oil, a recovered liquid is collected and stored in a recovery tank, the water-insoluble cutting oil and the other solution are separated based on the specific gravity difference and respectively reused.
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