dl
abbr. 基准线(=Datum Line)abbr. 静恒载(=Dead Load)abbr. 延迟线(=Delay Line )
abbr.
1. =data link 资料传输装置
2. =day letter (比一般电报缓发的)日间电报
3. =demand loan 活期贷款
4. =driver's license 汽车驾驶执照, 驾照