火花塞只点燃火花隙附近的燃料混合物，这就降低了燃烧效率，并且随着使用年限增加火花塞中的金属慢慢被侵蚀。
Spark plugs only ignite the fuel mixture near the spark gap, reducing the combustion efficiency, and the metal that makes them up is slowly eroded as they age.
中温强度高，高温体积稳定，耐磨损，抗熔渣侵蚀。返料器、省煤器炉墙、混合室内墙等部位。
High strength in medium temperature, stable volume in high temperature, wear-proof, anti-slag corrosion, material returner, coal-saver furnace wall and mixing chamber inner wall etc.
中温强度高，高温体积稳定，耐磨损，抗熔渣侵蚀。返料器、省煤器炉墙、混合室内墙等部位。
High strength in medium temperature, stable volume in high temperature, wear-proof, anti-slag corrosion, material returner, coal-saver furnace wall and mixing chamber inner wall etc.
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