|
US2730602A
|
|
Apparatus for electrically eroding materials
|
|
GB737397A
|
|
Improvements in or relating to spark-cutting apparatus
|
|
GB726960A
|
|
Improvements in or relating to spark-cutting apparatus
|
|
GB748544A
|
|
Improvements relating to apparatus for cutting materials by electric sparks
|
|
US2628330A
|
|
Condenser-charging system for spark-cutting devices
|
|
GB748541A
|
|
Improvements in or relating to method and apparatus for producing a screw thread or the like in a workpiece
|
|
US2756316A
|
|
Apparatus for electrically eroding materials
|
|
US2650979A
|
|
Method and apparatus for electrically disintegrating metallic material
|
|
CA523239A
|
|
Method and apparatus for the production of a screw thread or the like in a work piece
|
