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Advances in Civil Engineering
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2024
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Article
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Fig 11
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Research Article
Research on Hydraulic Fracturing Technology of Long Boreholes along Strata of High Vast Thick Coal Seam
Figure 11
Hydraulic fracturing drill pipe: (a)
Φ
73 mm central cable drill pipe and (b)
Φ
73 mm nonmagnetic drill pipe.
(a)
(b)