Fasteners are also called standard parts on the market, and are mechanical elements that can mechanically fix or bond two or more elements together. It is characterized by a wide variety of specifi...
Embedded parts (prefabricated parts) are the components that are pre-installed (buried) in concealed works. They are the structural parts that are placed when the structure is poured, and are used ...
The production process of the tooth bar is the simplest, wire drawing, blanking, chamfering, typing, heat treatment, thread rolling, surface treatment
If you have the strength, please refer to...
Dear friend
We will give masks and other protective equipment to friends from abroad for free. We will also pay for the express fee. I hope you can take good care of yourself and ensure your safe...