[Haichuan Chemical Industry Site] Moguba Erxian Rock Sealed Salt Cave in Jianshi County, Hubei Province
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Such ruins must be among the high mountains. Why? ----------------------------------------------------- Click the link below to open it directly. You can see some interesting ruins [Haichuan Chemical Industry Site] Saltpeter Cave summary post. Why did the ancients refine saltpeter in caves? ? https://bbs.hcbbs.com/thread-2145992-1-1.html (Source: Haichuan Chemical Forum Network)
This post was last edited by Yuyu in the Desert at 2018-11-15 12:56. Welcome everyone to participate in the following series of sharing discussions. Click on the link to open the summary post of the [Haichuan Equipment Guess] series. All sea friends are welcome to participate! https://bbs.hcbbs.com/thread-2079686-1-1.html (Source: Haichuan Chemical Forum Network) [Ocean. Chemical Industry Pioneer] Series Summary Posts https://bbs.hcbbs.com/thread-1842627-1-1.html (Source: Haichuan Chemical Forum Network) [Haichuan Modular Installation Discussion] Summary of posts, everyone is welcome to discuss! https://bbs.hcbbs.com/thread-1773168-1-1.html (Source: Haichuan Chemical Forum Network) [Haichuan Food Guess] series of summary posts are being continuously updated. Can you recognize thousands of foods? https://bbs.hcbbs.com/thread-2142205-1-1.html (Source: Haichuan Chemical Industry Forum Network) [Haichuan Chemical Industry Site] Summary post on saltpeter caves. Why did the ancients refine saltpeter in caves? ? https://bbs.hcbbs.com/thread-2145992-1-1.html (Source: Haichuan Chemical Forum Network)