Beef is rich in protein, its amino acid composition is closer to the human body than pork, and it can improve the body's disease resistance. Cold winter beef has a warm stomach and it is good for winter. Spinal Rod & Screw System,Polyaxial Pedicle Screw,Monoaxial Spinal Screw,Pedicle Set Screw Changzhou Ziying Metal Products Co., Ltd , https://www.ziyingmetal.com
