The orderer role is responsible for processing the shipping schedule.
角色 orderer 负责处理运送进度表。
The interaction involves two lifelines: one for the orderer and another for the shipper.
这种交流涉及到了两个生命线：一个为定序者一个为传递者。
These object instances are the orderer and shipper properties in the Service specification class.
这些对象实例就是Service规范类中的订货方和运送方属性。
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