Jing tongP ro/ENGINEER zhong wen ye huo ban

By bing Ran

Subjects: Ying yong ruan jian, Ji suan ji fu zhu she ji, Chan pin she ji, Ji xie she ji

Description: Ben shu gong fen wei 10 zhang, di 1-3 zhang shi dui ruan jian ji chu zhi shi ji cao zuo de jiang jie ; di 4 zhang wei chan pin she ji qian de zhuan ye ji chu pu dian ; di 5-10 zhang shi dui dian xing chan pin she ji an li de shen ru pou xi.