Chang hua dian zi jiao huan ji bei yong dian lu ban chu bei fang fa zhi yan jiu
Subtitle: A study on spare parts requirement of toll electronic switching system
By: [Yang Wenxiang]
Publisher: s.n.]
Published: 1982
Place of publication: [Xinzhu shi?
Language: chi
Number of pages: 87
Other titles: Study on spare parts requirement of toll electronic switching system.