1.The invention aims to solve problems in the prior compensation pulse generator, such as complicated electrical excitation structure and unadjustable permanent magnet excitation output.

1.目是解决现有脉冲发电机电励磁结构复杂、永磁励磁输出不能调节题。

2.For unadjustable ones, the exit may be the best choice.This paper also studied the relevant barrier, ways and policies.The last part can be viewed as a case discussion.

2.而对不可调整升级型衰退产业本文则做出了退出，并对退出障碍、退出方式及顺利退出政策保障进行了论述。