AV片在线观看,精品国产亚洲av麻豆,无码人妻AV免费一区二区三区,国产69精品麻豆久久久久

Brand product --Steel for engineering machinery

Jianlong Beiman has a long history of producing steel for engineering machinery. The products are characterized by high purity, uniform and dense microstructure, stable hardenability, high dimensional accuracy and good surface quality. The process technology and material quality have reached the international advanced level. It is widely used in the production of large-scale engineering machinery hydraulic excavators, bulldozers and other key parts, such as crawler link, supporting wheel body, crawler wheel hub, heavy load wheel axle, gear and so on. Since the products have been approved by international well-known companies such as American caterpillar and domestic large construction machinery companies, Jianlong Beiman has become their qualified suppliers.

Product specifications:

Ф20mm ~Ф310mm