Tweezers (niè zī) is used to take a block of drugs, metal particles, hair, thin thorns and other small things access to a tool. Can also be used for cell phone repair, use it to hold wires, components and integrated circuit pins. Different occasions require different tweezers, generally have to prepare straight, flat, elbow tweezers each one. Tweezers used in chemistry can not be heated, can not be acid-coated drugs, must be kept clean after use.
