How closely a part matches its intended size, and how tightly parts fit together.
What it is
Tolerance is the allowed variation from a design dimension. In EDC talk it also means fit: tight tolerances leave very small gaps between moving parts.
Why it matters
Tight tolerances usually mean less slop and a more premium feel, but parts that are too tight can bind. Consistency across a batch matters as much as the number.
Also known as: Machining Tolerance, Fit, 配合精度.
是什么
公差是相对设计尺寸允许的偏差。在 EDC 语境里也指配合：公差严，活动部件之间的间隙就很小。
为什么重要
公差严通常意味着旷量小、手感更高级；但配合过紧会卡滞。同一批次的一致性和数字本身一样重要。
又称：Machining Tolerance、Fit、配合精度。
