-
Alkali rock type gold deposit is a new type of gold deposit which was found and valued in later of 1980s.
碱性岩型金矿是80年代后期被发现和重视起来的一种新类型金矿。
youdao
-
Alkali rock type gold deposit is a new type of gold deposit which was found and valued in later of 1980s.
碱性岩型金矿是80年代后期被发现和重视起来的一种新类型金矿。
youdao