The hole in your trousers is not noticeable.
子上洞不。
The hole in your trousers is not noticeable.
子上洞不。
Alkalescent granites and gold-related silication and argillation are geological prerequisites for the formation of noticeable gold deposits.
摘要偏碱性花岗岩及与金成矿活动有关硅化、粘土化蚀变是黑刺沟金矿田规模金矿床存在地质前提。
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