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

普通法上，收回权是不可转、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.

实现了协同网络税务办公系统，给出了使用JAVA语言工实现，包括工核心接、要实现以及工引擎实现，并在该工基础上，实现了该系统公文转、审批程设置等要办公业务。