中文字幕无码久久人妻_中国无码a一级刺激片_国产综合色产在线观看_色多黄片资源2020

Students experience 3D printing at course in Qingdao, E China's Shandong

Source: Xinhua| 2018-06-01 17:01:45|Editor: Li Xia
Video PlayerClose

#CHINA-SHANDONG-QINGDAO-3D PRINTING COURSE (CN)

A technician introduces the principle at a 3D printing course at Changjiang School in Jimo District of Qingdao City, east China's Shandong Province. 3D printing principle and modeling technology were introduced to the students at the course. (Xinhua/Liang Xiaopeng)

   1 2 3 4 Next  

KEY WORDS: 3D printing
EXPLORE XINHUANET
010020070750000000000000011100001372232451