Local story · Zigong, China
The Deepest Well of Its Time
In 1835, Zigong miners drilled a well reaching 3,300 feet, described in the source as the world’s deepest well at that time. The drilling techniques developed…
Local story · Zigong, China
In 1835, Zigong miners drilled a well reaching 3,300 feet, described in the source as the world’s deepest well at that time. The drilling techniques developed…
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