An associate or bachelor's degree is typically required to pursue employment as a diagnostic medical sonographer. Students also have the option to graduate with a degree in a related field, pursue a certificate program in diagnostic medical sonography and then receive on-the-job training.nly a few states require sonographers to be licensed. While state requirements can vary, a professional certification from a national credentialing organization is often required to become licensed.
In computing, the Post Office Protocol (POP) is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection. Reply Judy Ashby
What Is A Poppet Valve. Poppet valves are actuated by mechanical or electrical. Electrical control include two-port solenoid operated poppet valves and three and four-port solenoid operated poppet valves.Poppet valves are similar to check valves in that the sealing element is a poppet but they are actuated by mechanical or electrical means.Advantages over convention spool-type directional controls are: 1. Virtually zero leakage in closed position.hat Is A Poppet Valve. Poppet valves are actuated by mechanical or electrical. Electrical control include two-port solenoid operated poppet valves and three and four-port solenoid operated poppet valves.