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Figure 7 shows the use case diagram for the system.
图7展示了这个系统的用例图。
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Figure 2: Use Case diagram for the same retail system shown in Figure 1.
图2：与图1中显示的相同的零售系统用例图。
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Figure 2: Use Case diagram for the same retail system shown in Figure 1.
图2：与图1中显示的相同的零售系统用例图。
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