With the numerical simulation of heavy-duty diesel engine to strengthen performance, a CAD assembly model of cylinder head bolt is built based on the thread.
结合大功率柴油机性能强化的数值计算，在考虑螺纹的基础上建立了气缸盖螺栓的CAD装配体模型；
Outer hexagon bolt in the bolt where the most frequently used type of one of its own external thread of the main function is to tie in with the nut.
外六角螺栓是在螺栓种类里使用最频繁的一种，它所拥有的外螺纹的主要功能是与螺母配合。
Side view of square head bolt with adjustable thread length.
螺纹长度可调整的平头一字槽螺钉的侧面图。
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