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Economic significance of rocks building materials, fuel, ores
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Economic significance of rocks building materials, fuel, ores
1 天前
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What Are Common Depositional Environments of Basins?
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YouTubeWorld Gold & Legacy
In mine exploration, the four elements of diamond bit drilling include WOB, rotational speed, torque and water quantity. get intoHard → especially hard rock strata, in order to achieve efficient footage, WOB is the primary factor, followed by using medium and low speed. Drilling medium hard good drillability rock stratum, high rotation speed can achieve complete and efficient footage. Torque is the prerequisite for maintaining balanced drilling. The amount of water can not only cool the lip surf
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TikTokantaiaceo5q
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