保证应力：保证载荷/应力截面积 保证载荷：螺母或螺栓在做拉伸试验时，沿轴线方向施加载荷并持续五秒。卸除载荷后，螺母不得脱扣或断裂，并且可用手将螺母旋出，或借助扳手可松开螺母（不超过半扣）。对螺栓而言，卸除载荷后螺栓无明显变长（测量误差为±12.5微米）。此载荷即为保证载荷。 应力截面积：螺栓的应力截面积计算见GB/T3098.-2000的第8章，螺母的应力截面积见GB/T3098.2-2000的第6章。
因为这保证软组织更小应力，也致使螺钉改变方向而提供更大阻力对抗结构体分离。
This ensures less stress on the soft tissue and also leads to diverging directions of the screws, affording increased resistance of the osteosynthesis to detachment.
控制网架的焊接变形与焊接应力是保证网架质量的关键之一。
Controlling on grid welding deformation and welding stress are the key problems for assuring grid quality.
阀座碟簧提供了连续的机械压力，保证热应力变化时球体与阀座始终密合。
The valve saucer reed offers the continuous mechanical pressure, guarantee the spheroid and valve seat are closely fitted all the time when the hot stress changes.
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