The present invention provides methods and apparatus for cutting tubulars in a wellbore. The sensor is operable over a short range and is preferably mounted in close proximity to the path of the moving object preferably utilizes CW Doppler radar of a microwave radio frequency. The parameters are stored in a memory structure. A valve metal plate is disposed over the first metal flow field plate in the flow field assembly. The system may include a method for controlling the representation of a map portion. a movable shaft connected to the set of rotatable blades; iv.