aluminum foil wrapping paper ,aluminum foil paper roll ,aluminum foil food wrapping paper ,reasonable price aluminum paper foil roll ,low price aluminum foil paper roll Qingzhou Xincheng Packaging Co., LTD , https://www.qzxcbc.com
The constant tension spring compensation device of the electrified railway contact network of Yangzhou Dongfang Hanging Co., Ltd. is a self-developed product. After 16 years of technical research, it has reached the international advanced level, and the company has complete independent intellectual property rights. The product has entered mass production and has been installed in Beijing South Railway Station, Tianjin Railway Station, Qingdao Railway Station, etc., contributing to the sixth large speed increase of the national railway.
Yangzhou Oriental Hanger Co., Ltd. and Beijing Lianhelian Intellectual Property Agency Co., Ltd. signed the "Foreign Patent Application Contract", preparing to contact the network constant tension spring compensation device and other products to Japan, the United States, Canada, Russia, India, the European Community, etc. Six countries and regions applied for international patents, and Yangzhou spring devices began to impact "international patents."