normal erosion [地质] [土壤] 正常侵蚀 ; [土壤] [地质] 常态侵蚀 ; 普通侵蚀

normal erosion cycle 正常侵蚀旋回

normal cycle of erosion 正常侵蚀循环

normal erosion intensity 正常侵蚀

normal l erosion 正常侵蚀

normal cycle erosion 正常循环冲蚀