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 could turn on the harps of the blessed.他能召来天使的竖琴为他奏乐.The sound I heard was like that of harpists playing their harps.并且我所听见的好像弹琴的所弹的琴声.They came to Jerusalem, to the house of the LORD, with harps lyres and trumpets.都弹...