Since the design here is critical, it is usual for the enclosure to be certified to National Standards by a recognised test house.

因为这种设计十分重要，所以这种封套通常经符合国家标准的特许测试机构检验合格。

youdao

Since the design here is critical, it is usual for the enclosure to be certified to National Standards by a recognised test house.

因为这种设计十分重要，所以这种封套通常经符合国家标准的特许测试机构检验合格。

youdao