Blood is oxygenated and cleansed before being returned to the left atrium through the pulmonary vein and then to the left ventricle. The left ventricle is in charge of supplying oxygenated blood to the aorta. This cycle is repeated, resulting in a double circulation....
Schematic diagram of finished concrete pipe segments The company is building two fully automated production lines for concrete pipe segments, and the entire process of pipe segment production