Sub Variations In A Use Case Diagram

Titan Wall Clock For Home Titan Wall Clock Online 12 Inch Battery Wall Clock Titan Wall Clock New Model Wall Clock 35Cm Diameter Titan Wall Clock Big Size Titan Wall Clock Round Wall Clocks Battery Operated Staples Wall Clock Round Universal Round Wall Clock Plastic Wall Clock Titan Contemporary Wall Clock 12 Inch Wall Clocks Battery Operated Wall Clock Round Shape Titan Wall Clock Large Size 10 Inch Wall Clocks Battery Operated 8 Wall Clock Battery Operated Classy 12 Inch Wall Clock Titan Wall Clock Black 12 Wall Clocks Battery Operated