网络与数据通信 协议体系与组成结构 释文 OSI presentation layer OSI表示层
- Butterworth filter
- Buttiker formula
- button
- button ads
- button capacitor
- buttonhole stitching
- buttonholing machine
- buttoning
- button sewing
- buttress
- butt welding
- Butuo Xian
- Butwal
- butyl acetate
- butyl alcohol
- butylated hydroxyanisole
- butylated hydroxytoluene
- butylene
- butylene oxide
- butyl ether
- butylethylene
- butyllithium
- butylphosphate
- butyl rubber
- butyl xanthate