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1·In mass production, where mating parts must be interchangeable, unilateral tolerances are customary.

大规模生产中配合零件必须能互换，单向公差是经常遇到的。

2·The sum of the parts of the mating parts is less than or equal to the allowable deviation of the assembly.

相互配合零件公差之和小于或等于装配允许偏差，零件完全互换。

3·Secondly, it is used as a method of obtaining very close fits between mating parts such as pistons and cylinders.

其次，它能用作获得像活塞与气缸之类配件间过盈配合的方法。

4·Proper torquing avoids elastic separation of the mating parts under load and resists gradual loosening over time.

扭矩正确，就能防止配合部件在负荷作用下出现弹性分离，并防止部件在长期运转过程中逐渐松动。

5·It is the minimum clearance space intended between mating parts and represents the condition of tightest permissible fit.

它是配合零件之间最小的预期间隙空间，代表着允许的最紧配合条件。

6·Hexagon thin nuts are also called Hexagon jam nuts. They are often used when there is spacial limitation on the mating parts.

六角薄螺母的厚度较薄，多用于被连接机件的表面空间受限制的场合。

7·Fretting damage exists on tightly mating parts at large, which is one of the disaster reason making components and parts fail.

微动损伤普遍存在于紧密配合部件中，是造成零部件失效的主要祸患之一。

8·To have an interference or force fit between mating parts, the tolerances must be such as to create a zero or negative allowance.

为了使配合零件之间具有过盈或强制配合，公差必须产生零或负允差。

9·Does the supplier understand the critical nature of dimensions that interface with the customer's application of their mating parts?

供应商是否理解其与其它件相配合的关键尺寸对顾客使用的影响？

10·Fits can range from free running or sliding, where a certain amount of clearance, exists between mating parts, to press or interference fits where parts are forced together under pressure.

配合可分为结合件间有自由转动或滑动从而需要具有一定间隙量的间隙配合以及结合件需要紧密压靠一起 的压配合或过盈配合。