Materials for manufacturing photovoltaic stand equipment are different from other equipment products to effectively prevent the equipment from being corroded. Therefore, three kinds of concr

High strength hexagonal bolt is a kind of bolt which is widely used. Class A and Class B high-strength hexagonal bolts are used for important assembly accuracy requirements, as well as place

The steel bar can be rolled and delivered. Each plate should be a steel bar. It is allowed to have 5 % of the number of discs per batch(less than two plates can be used) consisting of two st

There are generally two ways to distinguish between high-strength bolt nuts and ordinary bolt nuts: one is to hit hardness, and the other is to read warranty. If there is no warranty, it is