产品数据管理理论的文章，祁国宁产品数据管理技术及其应用，非常难得。-Product Data Management Theory articles, QI Guo-ning product data management technology and its applications, is very rare.

是温度传感器的资料 包括全部的使用说明 官方的哦 -Is a temperature sensor includes information on all of the instructions for use official oh