July 16, 2022

The first is the coil unit. According to the requirements in real life, the special screw factory needs to find out the factory coil, specification, material and product name, as well as the weight and quantity, and then purchase some suitable wire rods. When buying, you should pay attention not to choose low-quality ones for

In the structure of plastic products, the material of the screws is related to the factors required by the product, such as the size of the force, and stainless steel is used on the outside of the plastic, and carbon steel screws are used on the inside. How to choose stainless steel? 1: In layman’s