jgg     2010 30 (1):  150-154    ISSN: 0412-1961  CN: 21-1139/TG DESIGN OF SIMULATION TRAINING SYSTEM OF EARTHQUAKE PRECURSORY OBSERVATION DEVICES Li Jun ;and Shan Weifeng Institute of Disaster Prevention Science and Technology, Sanhe 065201 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null