new_contents: import entity
  from symlib.terminal import ITERM
  
  
  class PB_NO(entity.CodedSymbol):
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
  
      def generate(self):
          return [
              ITERM(right=False),
              entity.Line(start=entity.Point(10, -10), end=entity.Point(50, -10)),
              entity.Line(start=entity.Point(30, -10), end=entity.Point(30, 10)),
              ITERM(left=False).translate(xoff=40, yoff=0)
          ]
  
  
  class PB_NC(entity.CodedSymbol):
      def __init__(self, *args, **kwargs):
          super().__init__(*args, **kwargs)
  
      def generate(self):
          return [
              ITERM(right=False),
              entity.Line(start=entity.Point(10, -5), end=entity.Point(50, -5)),
              entity.Line(start=entity.Point(30, -5), end=entity.Point(30, 10)),
              ITERM(left=False).translate(xoff=40, yoff=0)
          ]
  
subject: Move pilot devices to new system.