一、产业结构概述PC即个人电脑(personalcomputer)的简称。PC制造业的产业结构大致可分为上、中、下游三个层次。上游是整个PC业的龙头,是产业的技术和工业标准发布地,属技术密集型,具有很强的行业壁垒。位于上游环节的是极少数掌握了PC关键技术、其产品已被视为产业内不可缺少 First, an overview of industrial structure PC is the abbreviation of personal computer (personal computer). The industrial structure of PC manufacturing industry can be roughly divided into upper, middle and lower reaches of the three levels. Upstream is the leading PC industry, is the industry’s technology and industry standards launch, is a technology-intensive, with strong industry barriers. In the upper part of the chain is a very small number of key PC technology, its products have been deemed indispensable in the industry