TY - Journal of Changjiang River Scientific Research Institute A1 - MA Wen-jun, ZENG Ya-wu, YE Yang T1 - Experimental Study on Contact Mechanical Properties of Marble Spheres under Cyclic Loading and Unloading Y1 - 2022-07-01 JF - Journal of Changjiang River Scientific Research Institute JO - Journal of Changjiang River Scientific Research Institute SP - 93 EP - 101 VL - 39 IS - 7 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20210275 ER -