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The material of the rocker arm is generally quenched, chrome-plated, etc. Because it is an important connection fitting for connecting the valve, it will also affect the lifetime of the engine when it is working. Because the force of the rocker arm is not vertical, but has a certain slope, it is easy to move up and down when the engine is running. Therefore, when installing, we must remember not to miss the installation, not reverse installation, and install the corresponding program.
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