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how to use: 1. Clean the surface of the ear with alcohol or kerosene until completely free of grease, dirt and wax. 2. Clean the number and jaws with alcohol or kerosene before/after use. 3.To avoid typing in the hairy, dark black skin, the upper band of the ears and the protrusions. 4. The needle of the guaranteed number enters the surface of the ear. 5, After the ear typing, first use a cotton bat to stop the blood and suck a thousand of blood, rub enough ink (preferably Special ink for ear tongs, advanced oily reagent, tighten the cap after use to prevent volatilization, do not approach fire Source and children), ensuring full penetration.