国产精品乱码电影_国产欧美日韩亚洲精品区不卡_韩国a级毛片在线观看_一级无码黄色网站_久久中文字幕对白全国探花_人妻av中年熟妇无码系列_男女超爽视频免费播放在线观看_国内喷白桨黄色网站_又大又粗欧美黑人_欧美熟女自拍偷拍

1, bachelor degree or above;

2, able to skillfully use office software such as CAD, Solidworks, offica;

3, familiar with steel welding technology;

4, jig design experience is preferred.