... , bleaching, etc ).5. Sliding sampling switch backward, making sure 1.it moves smoothly; 2.needle without defects (bending, tip damage, etc ... product is found to have quality problems, do not use it, contact the supplier immediately.Use Guide:1. Check whether the ... indicating the obturator is advanced, and then press the button again, a "click" sound indicating the cannula is advanced, meantime biopsy ...