公差范围 
[机] tolerance zone
[机] tolerance range
- 岩钉钢环制造商对重力作用点一直未作研究,重力作用点取决于未知的公差范围。
The point of actuation by gravity has not been investigated by the karabiner manufacturers and is subject to an unknown tolerance range. - 但是实际情况是变化的——我们需要考虑的是要为目标值建立一个公差,在这个公差范围之内的性能都认为是可接受的。
But reality is variable -- and to take this into account we need to establish tolerances for goals, within which performance is considered acceptable. - 相反,允许降低公差范围但要求完善的磨削和测量技术的新型喷油嘴ZHI和IRH的密封线却慢慢远离针阀顶端。
Conversely, the seat line of the new ZHI and IRH seat geometires migrate away from the tip, allowing a reduction in tolerance limits but requiring sophisticated grinding and measuring technologies.