国产女人与狥交下配_五月丁香综合缴情六月小说_精品午夜美女视频_久久天天躁夜夜躁狠狠躁_亚洲区国产区欧美区_黄色大片中文字幕_日韩亚太中文字幕网_天堂资源WWW在线_无尽女同扶她3D_国产毛片成人av高清

上海龍干高分子材料有限公司
Shanghai Longgan Polymer Material Co., Ltd.

Polyurethane rigid foam insulation project The 12th China International Polyurethane Exhibition was held

Addtime:2021-04-27

From September 3 to 5, the 12th China International Polyurethane Exhibition, co-sponsored by China Minmetals Corporation and China Polyurethane Industry Association, was held at Shanghai New International Expo Center, attracting more than 400 exhibitors and nearly 10,000 visitors View the exhibition. The picture shows Liao Zengtai, President of Wanhua Chemical, introduced the new polyurethane material developed by the company to Li Shousheng, the executive vice chairman of the China Petrochemical Federation.


[Back]