网络与数据通信 协议体系与组成结构 释文 synchronous digital hierarchy, SDH 同步数字体系
- Northwestern China coal occurrence area
- northwestern dwelling
- Northwestern Geology
- Northwestern Polytechnical University
- Northwestern Polytechnical University library
- North-Western Province
- Northwest Farming Culture Museum
- Northwest Film Company
- North West Fine Arts
- Northwest Institute for Non-ferrous Metal research
- Northwest Institute of Nuclear Technology
- Northwest Ordinance
- Northwest Pacific Basin
- Northwest Passage
- Northwest People's Radio
- Northwest Rare Metal Materials Research Institute
- North-West Rebellion
- northwest region of China
- North-West School Question
- Northwest Territories
- North-West Territories Act
- Northwest University
- North Wind Blows
- North xinjiang power plant
- Norton's theorem