With the progress of the times, people's demand for cars is greatly improved, and the reliability and safety of cars are more and more valued, with a higher proportion. As the main part of the engine, the crank and connecting rod mechanism has to accept not only high temperature and high pressure, but also various complex and periodic impact and load because of the extremely cruel working environment. Its failure will not only cause damage to other parts of the engine, but also produce huge potential safety hazard. Safety is very important to our consumers.<br>
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