国产强被迫伦姧在线观看无码,国产精品久免费的黄网站,久久99国产精品久久99果冻传媒,国产v片在线播放免费无码

    









Drafting of Industry Standards---

In 2017, Jiangsu Longda was one of the industry standard drafters, and the technical director of Jiangsu Longda approved the industry standard of heat transfer printing machines as the standard drafter.


        






Intellectual Property

Patents

The first to produce the fixed height curtain transfer printing with width of 2.8

More than 20 invention patents

Nearly 100 utility model patents

Nearly 1,000 appearance patents