A valve is a device used for controlling the pathway of air or fluid. It is present in any mechanism that deals with liquid flow or airflow. There are valves present in our heart as well, controlling the blood flow. Just like that, water pipes contain a valve called the globe

In the present scenario construction industry is dependent on machinery to fulfill job at a fast pace. What a machine can do, you will require a couple of laborers to finish the same task. The dependency on machine is increasing because of convenience. You can see several machines, which can