This is a novel ball joint that can be arrested with pneumatic pressure. You simply have to press a switch and the ball joint gets pressurised and fixed in its position.

The invention of the technology and control technology to effectively adjust the hardness of workpiece, without changing the original material on the basis of performance so that the work to eliminate

The present invention of the implementation process can effectively control the hardness value; supporting the use of technology to deal with the preparation, targeted plating on the good parts of hyd

A new preparation technology which can make the oil-well pump's pump barrel, plunger and pump valve withstand a high temperature and high temperature corrosion and wear

Anti-tubing and a tubing corrosion Coupling, gluing process technology