At common law, the right of re-entry is not alienable, assignable, or devisable.

普通法上，收回权是不可流转、转让或遗赠。

Workflow realization base on JAVA was given, including kenel interface, main classes and workflow engine.File flow, examine and approve flow function of the system were realized based on the workflow.

实了协同网络税务办公系统，给出了使用JAVA语言工流实，工流接口类、主要类实以及工流引擎实，并在该工流基础上，实了该系统公文流转、审批流程设置等主要办公业务。