This tractive four takes you to some of San Francis's most cheerful holiday scenes.

这四张照片将带你领略圣弗朗西斯最令人愉快的节日场景。

The first piece is about the tractive calculation on railway trestle.

论文的第一篇是关于铁路栈桥列车牵引计算.

The first piece is about the tractive calculation on railway trestle .

论文的第一篇是关于铁路栈桥列车牵引计算。

The high molecular weight tractive agent upgraded strength mechanics properties greatly.

高分子型牵引剂能大幅度提高聚丙烯复合材料力学性能。

The real time calculation of tractive force and braking force is the core of the system.

它的核心是能够实时计算得到机车运行过程中的牵引力和制动力.

Many formulas appeared in literature since DuBoys(1879)presented his tractive force relation.

自杜波阿（1879）提出他的拖曳力关系式以来，文献中已经出现了许多公式。

Then axil shear tractive force of the whole structure of imitate bridge was measured in each.

然后，按照随机的顺序，对模拟的金属翼板粘结桥模型逐一进行了整体结构的轴向剪切拉力测试。

How to increase tractive effort of MG 300 W type coal winning machine and adopt some measures.

针对如何增加MG300W型采煤机牵引力而采取的一些措施.

Many formulas appeared in literature since DuBoys(1879)presented his tractive force relation .

自杜波阿（1879）提出他的拖曳力关系式以来，文献中已经出现了许多公式。

Jiasha landslide is a large scale tractive landslide and on the stage of creeping deformation.

贾沙滑坡处于蠕变阶段，变形范围大，属大型。