jgg     2009 29 (2):  39-42    ISSN: 0412-1961  CN: 21-1139/TG ANALYSIS OF APPLICATION OF AIR GUN TO DEEP CRUST EXPLORATION Yang Guangliang 1) ; Zhu Yuanqing 2) ; and Sun Lijian 2) 1) School of Ocean and Earth Science, Tongji University, Shanghai 2000922) Earthquake Administration of Shanghai Municiplity, Shanghai 200062 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null