Affilication of Author(s):

中国科学技术大学

Disigner of the Invention:

付建民,lixiaofeng

Patent description:

实用新型

Application Number:

91225387.8

Number of Inventors:

3

Service Invention or Not:

no

Publication Date:

1992-05-06

Authorization Date:

1992-05-06

First Author:

wangjianping