29 / | HD | METAL WORKING |
700 | DF | MEANS TO ASSEMBLE OR DISASSEMBLE {55} |
709 | DF | .~ With control means energized in response to activator stimulated by condition sensor {4} |
714 | DF | .~.~ Responsive to work or work-related machine element {4} |
719 | .~.~.~ Including means to apply magnetic force directly to position or hold work |