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The in-plane equivalent elastic modulus and tensile strength of stitched composite laminates are studied, and its found that the in-plane equivalent elastic modulus decreases with the increase of stitch density, stitch thread diameter, maximal misalignment angle and the distortion width, and the range is about 5%. The tensile strength of stitched composite laminate increases with the increase of stitch step and decreases with the stitch space.

研究结果表明：随着缝纫密度、缝纫线直径、最大纤维偏转角和缝纫变形区宽度的增加，缝纫复合材料层合板面内等效模量逐渐降低，最大降幅一般在5%左右；缝纫复合材料层合板的拉伸强度随缝纫针距的增加而增大，随缝纫行距的增加而降低，因此缝纫密度对拉伸强度的影响程度要看具体的缝纫针距和行距。

To make a doily or lace, you use thin thread and a small hook.

为了织一盘垫或花边，您可以使用超薄串和一个小钩。

This means that even when the thread is created, we put it into a dormant state.

这意味着，即使是线程被创建，我们也将让它进入等待态。

Angle valve for 90o installations using internal pipe threads and having double lead-thread stem control for rapid adjustment.

角阀，适用于90o安装，采用内管螺纹，并且配置双引线-螺纹阀杆，调节更加快速。

Pattern for straight 180o installations using internal pipe threads and having double lead-thread stem control for rapid adjustment.

形阀，适用于垂直180o安装，采用内管螺纹，配置双引线-螺纹阀杆控制，调节更加快速。

However,"Her Groove Back side pumping Biyu Yin, Mei Liu draggle light gold thread."

但是，"嫩草方抽碧玉茵，媚柳轻窣黄金缕。"

Buy me some thread at the draper's shop.

到布店去给我些线来。

This is the dope for drill pipe thread. It can't be used for drill collar.

这是钻杆丝扣油，不能用在钻铤丝扣上。

As such, magnetic particle inspection for the screw thread of the drill collar is very necessary and important.

因而钻铤内外螺纹的磁粉检测十分必要和重要。

Drill collar thread ; finite element method ; stress ; structure optimization

钻铤螺纹；有限元；应力；结构优化

A strange and mysterious deep sea creature.

一种奇异、神秘的深海生物。

It's a yellow rectangle .

这是黄色的长方形。