Sandstones are, as a rule , interbedded with shales.砂岩通常都与页岩互层.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.A shale for...
He had a tattoo on his forearm.他前臂上刺有花纹.ObjectiveTo observe the effect of comprehensive therapy on forearm extensor myotenositis.目的观察综合疗法治疗前臂伸肌腱周围炎的康复效果.How did you come by that scar on your forearm?你臂上的伤疤是怎样来的？My forear...
Fill in gaps by using short, upward strokes of the pencil.用铅笔向上短短地勾画几道来填充空白。There were gaps in their counterterrorist strategy.他们的反恐战略存在漏洞。Contraction of the timbers left gaps in the fence.木料收缩,结果围墙露出缝来....