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651
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2025-08-14 14:59
1025
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2351
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421
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2025-08-14 14:48
774
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2025-08-14 14:48
2762
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2058
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603
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737
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2025-08-14 12:27
116
- One of the most significant advancements in rock drilling technology was the introduction of the pneumatic drill in the early 20th century. This drill used compressed air to rotate a bit, which significantly increased drilling speed and efficiency. However, it still required a great deal of physical effort and was limited in its application due to its size and weight.