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Take care not to rotate the machine in the opposite direction. 2. Never start the machine before filling the machine base with lubricating oil. 3. Remove the bobbin case and the needle thread from the machine before performing the trial operation. 4. Clean up the sewing hook and the bobbin thread trimmer every day after sewing work. Also check the level of the lubricating oil. 5. Never bring your fingers or hair close to, or place anything on the handwheel, V-belt, bobbin winder wheel or mot