Improvements relating to Welding Electrodes for Electric Arc Welding in Air
GB1117440A
Improvements in or relating to methods of securing a helically wound electrical conductor to electrically insulating stay rods, and to travelling wave tubes provided with such a conductor
GB1014257A
Improvements in or relating to magnetic erasing heads
GB1006172A
Improvements in or relating to controllable pulse repeaters
GB1016925A
Improvements in or relating to recording devices for magnetically recording video-signals on tape