二级交换中心

英语翻译

secondary switching center

拓展翻译

多级交换网络
multistage switching network

二级
secondary

二级安全阀
secondary safety valve(for inner container)

二级氨
secondary amine

二级胺
secondary amine

二级编码微指令
two-level encoding microinstruction

二级编址
second-level addressing

二级变速主皮带轮
main pulley for secondary change-speed

二级标准
secondary standard

二级标准磁盘面
secondary standard reference surface

二级标准文件
secondary standard file

二级不对称相转变
second-order asymmetric transformation

二级不对称转变
second-order asymmetric transformation

二级菜单
second-level menu

二级储备
secondary reserves

二级纯
A/R/; analytically pure

二级醇
secondary alcohol

二级存储器
second-level storage; secondary storage

二级代谢
secondary metabolism

二级地址
second-level address