DDR direct digital radiography
DDS (Direct Digital Synthesizer )
Digital direct current voltage meter
Digital direct ignition system
digital direct satellite broadcasting
direct digital computer
direct digital control
直接数字控制
直接数字控制系统
溶氧
直接式数字控制
直接数字控制器
direct digital control computer
direct digital control station
direct digital control system
Direct Digital Controller
direct digital controller DDC
direct digital design method
direct digital display oximeter
direct digital embedding
direct digital embeddingdigital subscriber line