Videodisc reader with concave mirror elements
Viewing system
Visual display of ultrasonic radiation pattern
Visual inspection apparatus for conduits
Visualization of vibrations, deformations or level lines of a th
White level clipping circuit
Wide band AFC system
Wide band aft circuit for television receiver
Wide band automatic frequency control circuit
X-ray encoding and decoding system
X-ray examination
X-ray inspection method and apparatus
Yoke mounting apparatus