TY - Journal of Yangtze River Scientific Research Institute A1 - CHANG Xin-ke, WU Shun-chuan, CHENG Hai-yong, FU Xin T1 - Full-waveform Characteristics and Frequency Spectrum of Acoustic Emission for Fine Sandstone Y1 - 2022-07-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 118 EP - 125 VL - 39 IS - 7 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20210249 ER -