网络与数据通信 有线网络 释文 data service unit/channel service unit, DSU/CSU 数据服务单元/通道服务单元
- spiral of Archimedes
- spiral of silence theory
- spiral of uniform velocity
- spiral orbit
- spiral pattern
- spiral pipe drainage system
- spiral point
- spiral potential
- spiral prismatic dislocation
- spiral ramp development
- spiral sampling design
- spiral similarity
- spiral sluice
- spiral structure
- spiral surface
- spiral test
- spiral tracer
- spiral track
- spiral vessel
- spiral water wall tube
- spiral wave
- spiral waves in excitable system
- spiral zooid
- spiramen
- spiramycin