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The unallowable wellbore enlargement rate (20%-30%) is the severest problem of wellbore qualities in the job area of north of Hubei.

率超标是鄂北工区井身质存在的最问题,一般都达20%~30%,影响成井质

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centralism, centralist, centralite, centrality, centralization, centralize, centralized, centralized-control, centralizer, central-lift,

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3G, 401(K), a,

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TED-Ed(视频版)

It starts out with a long vertical hole known as a wellbore drilled down through layers of sediment.

它从一个始, 该井筒,钻入沉积物层。

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centre of curvature, centre of gravity, centre of mass, centrebit, centre-bit, centreboard, centrebody, centre-crank, centrecut, centred,

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3G, 401(K), a,
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