public ElectricTipper(Tipper tipper) : base(tipper.Zx, tipper.Zy) { }
public MagneticTipper(Tipper tipper) : base(tipper.Zx, tipper.Zy) { }
public Tipper(Tipper tipper) : this(tipper.Zx, tipper.Zy) { }