狠狠操影院,成人综合在线观看,免费毛片全部不收费的,欧美天天,美女h黄动漫视频,性感美女黑丝视频,美女视频黄色大全

R & D/ expertise

1. The team has chemical engineers who have worked in the Institute of Chemistry

    and pharmaceutical enterprises for many years.

2. Rich experience in heterocyclic synthesis, boric acid and process development.

3. The management team has more than 40 patents and 80 publications.