后沟 meaning in Chinese

anal canal
caudal groove
posterior canal

Application of atmospheric cyanide - free desorption process in hougou gold mine
常压无氰解吸工艺在后沟金矿的应用
Sulcus auricul posterior
耳郭后沟
Weituo carried well one time , not only help the monks who live in the temple , but also help the people who passed front mountain
韦驮菩萨背了一趟井，前沟帮了巡山的，后沟帮了住庙的。
Satisfactory test results were obtained over the orebody in the hougou gold deposit which is covered by several meters of soil
后沟金矿矿体被数米厚黄土覆盖，所做电吸附找矿法试验研究取得较好效果。