Sandstones are, as a rule , interbedded with shales.

砂岩通常都与页岩互层.

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This paper presents the PDC bits with the satisfactory testing result in the multi - interbedded formation.

介绍了一种复合式PDC钻头,该钻头在多夹层地层钻井施工中取得了较好的试验效果.

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A shale formation with sandstone interbedded is also a potential oil bearing formation.

以泥岩为主,夹砂岩的地层也可能是油气层.

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Interbedded with the salt were thin layers of what appeared to be windblown silt.

跟结晶盐相互嵌在一起的薄层像是被风吹起的泥沙层.

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