Research on anti-loosening performance of variable-toot…

Very large locking force. In the force diagram of the force, when the axial locking normal thread and the dentition thread are compared with the force F, the normal force of the shank thread connection: the normal force of the common thread connection Therefore, in the case of the axial load, ie F

European chandelier brand ranking 2017 European style c…

European style is now a style of decoration, many people will choose a style, due to this reason the European ceiling is also very popular, European style ceiling brand is also very much, today the small series to introduce is the European chandelier brand rankings , to understand About the Europe

Sawn timber imports have been overtaken? The United Sta…

China board trading network news: According to the quarterly data of timber resources, the global trade in softwood sawn timber increased by about 12% to 121 million cubic meters in 2016. The strong demand for the sawn timber market in China has become the largest driver of the gro