NEAX61∑数字程控交换机的机架是否能顺利地国产化将直接影响整机的成本和市场竞争力。我们在与外加工厂家北京738机箱厂试制的过程中出现了尺寸超差和漆膜脱落现象,下面是在解决这些问题时所做的工作。由图1和表1可见试制的三台样机尺寸566±1都超下差,即低于565,造成模块箱无 NEAX61Σ digital program-controlled switchboard chassis can be successfully localized will directly affect the overall cost and market competitiveness. We have appeared in the process of trial production of the Beijing 738 Chassis Factory with the external processing factory. The following are the work done in solving these problems. From Figure 1 and Table 1 shows the prototype trial prototype size of 566 ± 1 are ultra-poor, that is less than 565, resulting in no module box