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Most conventional oil seals are designed only to withstand very low-pressure applications (about 8 psi or less). If additional internal pressure is present or anticipated, pressure relief is necessary.
What materials are available?


the hydrogenated nitrile rubber has a higher heat resistance and ozone resistance than the butyronitrile
There are different types of spark plugs available, including copper, platinum, and iridium. Each type has its own advantages and disadvantages, so it is important to choose the right spark plug for your vehicle based on its specific needs.
ignition spark plug
