单词speleology
n.: 洞穴学网络: 洞窟学
洞穴学
Guangxi Branch of Committee on Speleology in Nanning (0771-5842221, Xiao Tian can be reached at 13877193000)
位于南宁的广西洞穴研究协会分会(0771-5842221,联系人XiaoTian13877193000)