中文字幕av久久一区二区,亚洲国产AV玩弄放荡人妇,精品日本亚洲一区二区三区,丰满少妇被猛烈进入流水

Brand Products -- mine grinding ball steel

Jianlong Beiman is one of the earliest mining steel manufacturers in China. It has been cooperating with International company Moly-Cop for 16 years,and formulates the corresponding material standard and production technology and process according to the different requirements of users.

At present, more than 50 standards have been established, and more than 80 grades have been produced. The products are mainly exported to the United States, Canada, Mexico, Chile, Peru, Spain, South Africa, Australia, South Korea, Indonesia and other places, with a cumulative supply of nearly 2 million tons. Since 2015, the domestic mining steel market has been gradually developed, and stable cooperative relations have been established with domestic users such as Gangno, Huamin Steel Ball, Yilite, Anshan Mining and Shougang Mining,etc.

R & D concept: provide one-to-one R & D sales service guarantee for different regions and different mine ore characteristics.

R & D objectives: to establish a high starting point for products from standard formulation, and build an independent brand system that can accept the quality requirements of global mine steel users.

Product specifications

Ф20mm ~Ф101.6mm