The research on bit type selection with logging data was developed . This paper set up the relational model of interval transit time and rock drillability of formation rock by laboratory experiment and field document .

开展了利用测井资料进行钻头造型方面的研究，文中通过室内实验和现场 资料 统计，建立了地层岩石声波 时差与岩石可钻性关系模型。

If there is any change in the transit goods an operator shall submit the written document for it .

如 货物有变动情况，经营人还应当提交书面 证明。

The fifth chapter discusses the relation between right of control and stoppage in transit delivery of goods right of taking delivery of goods document of title and transfer of right .

第四章分析了控制权与中途 停运权、交付货物、提取货物、权利 凭证、权利转让之间的关系，从控制权与其他制度的关系角度考察了控制权的影响。