虚拟数据库级别?。
To solve these problems , this paper designs a vulnerability description language(VDL).
为了解决这些问题，文章设计了一种安全脆弱点描述语言。
Though VDL cementing index has quantitative evaluation standard, it is only a reference.
变密度（VDL）胶结指数虽有定量评价标准，但是仅供参考；
The flow line function and the flow function for extrusion were obtained from the construction of velocity discontinuity lines(VDL).
由构造速度间断线模型入手，建立正挤压的流线方程，以便求得是流函数。
When using CBL-VDL logging information to carry out cement bond evaluation, formation wave energy is major sign to reflect the second interface cement degree.
在利用CB L-VDL测井资料进行水泥胶结评价时，地层波能量是反映第二界面水泥胶结好坏的主要标志。
When using CBL-VDL logging information to carry out cement bond evaluation, formation wave energy is major sign to reflect the second interface cement degree.
在利用CB L-VDL测井资料进行水泥胶结评价时，地层波能量是反映第二界面水泥胶结好坏的主要标志。
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