Multi-level principal-agency systems among share holder meeting, board of directors and managers realize the separation between ownership and actual control power.
股东会、董事会、经理层等之间的多重委托—代理制度，实现了所有权和实际控制权的分离。
2
The work principle, system structure, and pulse control strategy of the cell series multi-level converter are discussed in detail.
详细阐述了单元串联多电平高压变频器的工作原理、系统结构以及脉冲控制的策略。
3
The multi-levelcontrol structure is also established on the basis of hierarchical control structure.