ISBN 9787563526581 books & textbook
Program-controlled switching and soft switching technology (in the 21st century Vocational planning materials)(Chinese Edition)
FAN XING JUAN // ZHANG ZHEN QIANG // HAN JING // LI YING // LIU BAO QING
Beijing University of Posts and Pub. Date :2011-08-01 version 1 /2000-01-01 Paperback
isbn-10: 7563526587 / isbn-13: 9787563526581
