孔的

Methods Based on Hamburger and Hamilton staging, chick embryos were selected.The formation of atrial septun and foramina secunda were observed with microdissection and SEM.

按Hamburger和Hamilton分期法，选用第20～26期鸡胚，用显微解剖术和扫描电镜方法，观察房间隔与第二孔的形态发生过程。

Pneumatic hammer is optional to carry out the construction of pilot bore in gravels, rocks and backfills.

可选配气动冲击锤，用于卵砾石、岩石和回填杂土中导向孔的施工

The test results indicate that the tool can satisfy the request to process long and thin hole on the nucleated glass.

实验结果表明，该超声加工工具可以满足微晶玻璃细深孔的加工要求。

For example, numbering and perforating can be carried out as an in-line operation after printing.

印刷后跟着进行印号码和打排孔的联动操作。

This is the pumicing operation.

这就是填孔的操作。

seepage ; drainage hole ; air element ; finite element method ; simulation

当以有限元法做渗流场分析时，若考虑排水孔的尺寸效应，以四边形或

The structure of visualized algorithm on block dividing and hole arrangement of tray was studied in the tray CAD.

研究了塔器CAD中塔盘分块与排孔的可视化算法结构。

The paper involves issues of repairing stand bearing block hole with high－ molecular complex material,including process flow,tips for positioning for the repair and result of the repair.

介绍了采用高分子复合材料修复机架轴承座孔的工艺流程，修复定位要点及修复效果。

Corolla limb 3.2-4 mm wide; nutlets without abaxial aperture.

花冠瓣片3.2-4毫米宽；没有背轴孔的小坚果。

Corolla limb 1.2-1.8 mm wide; nutlets with abaxial aperture

花冠瓣片1.2-1.8毫米宽；有背轴孔的小坚果 29c var。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。