Network[{Node[1, NodePosition -> {308., 166.}], 
   Node[2, NodePosition -> {20., 166.}], 
   Arc[{2, 1}, ArcBezierPath -> {{-0.333333, 0.}, {0.333333, 0.}}, 
    ArcCircleHeight -> 0., ArcStyle -> Line, ArcFlipped -> False], 
   Arc[{2, 1}, ArcBezierPath -> 
     {{-0.5847050000000001, 0.856452}, {0.5847050000000001, 0.856452}}, 
    ArcCircleHeight -> 0.642339, ArcStyle -> Circle, ArcFlipped -> True], 
   Arc[{2, 1}, ArcBezierPath -> 
     {{-0.5847050000000001, 0.856452}, {0.5847050000000001, 0.856452}}, 
    ArcCircleHeight -> 0.642339, ArcStyle -> Circle, ArcFlipped -> False]}, 
  ArcArrow -> False, ArcArrowAngle -> 0.4, ArcArrowColor -> GrayLevel[0.], 
  ArcArrowFlare -> 0.3, ArcArrowPosition -> 1., ArcArrowSize -> 17., 
  ArcColor -> GrayLevel[0.], ArcLabel -> "", ArcLabelColor -> GrayLevel[0], 
  ArcLabelDistance -> 0., ArcLabelPosition -> 0., ArcLabelSide -> Right, 
  ArcLoopAngle -> 3.141592653589793, ArcLoopClockwise -> False, 
  ArcLoopSize -> 0., ArcThickness -> 1., NodeAnnulusRatio -> 0.2, 
  NodeColor -> GrayLevel[0.], NodeLabel -> None, NodeLabelAngle -> 0., 
  NodeLabelColor -> GrayLevel[0], NodeLabelDistance -> 0., NodeSize -> 3., 
  NodeStyle -> Disk, PlotRange -> {{0., 325.}, {330., 5.}}, 
  ArcLabelFont :> $DefaultFont, NodeLabelFont :> $DefaultFont]